Category: Hormones
Abnormal Uterine Bleeding
Is this topic for you? This topic is for women who want to learn about or have been diagnosed with abnormal uterine bleeding (AUB). Abnormal uterine bleeding has several causes. If you don't know what kind of bleeding you have, see the topic Abnormal Vaginal Bleeding. What is abnormal uterine bleeding? Abnormal...
Abnormal Uterine Bleeding: Should I Have a Hysterectomy?
Guides through decision to treat abnormal uterine bleeding. Explains symptoms that doctor would look for before recommending treatment. Covers benefits and risks. Includes an interactive tool to help you make your decision.
Addison's Disease
What is Addison's disease? Addison's disease develops when the adrenal glands, which are above the kidneys, are not able to make enough of the hormones cortisol and, sometimes, aldosterone. Your body needs both of these hormones to work as it should. Cortisol helps the body cope with extreme physical stress from...
Adrenocortical Carcinoma Treatment (PDQ®): Treatment - Patient Information [NCI]
Adrenocortical carcinoma is a rare disease in which malignant (cancer) cells form in the outer layer of the adrenal gland. There are two adrenal glands. The adrenal glands are small and shaped like a triangle. One adrenal gland sits on top of each kidney. Each adrenal gland has two parts. The outer layer of the adrenal...
Adrenocorticotropic Hormone
An adrenocorticotropic hormone test measures the level of adrenocorticotropic hormone (ACTH) in the blood to check for problems with the pituitary gland and adrenal glands. ACTH is made in the pituitary gland in response to the release of another...
Aldosterone in Blood
An aldosterone test measures the level of aldosterone (a hormone made by the adrenal glands), in the blood. Aldosterone helps regulate sodium and potassium levels in the body. This helps control blood pressure and the balance of fluids and...
Aldosterone in Urine
An aldosterone test measures the level of aldosterone (a hormone made by the adrenal glands) in the urine. Aldosterone helps regulate sodium and potassium levels in the body. This helps control blood pressure and the balance of fluids and electrolytes in the blood. The kidney hormone renin normally stimulates the...
Amylase
An amylase test measures the amount of this enzyme in a sample of blood taken from a vein or in a sample of urine. Normally, only low levels of amylase are found in the blood or urine. But if the pancreas or salivary glands become damaged or blocked, more amylase is usually released into the blood and urine. In the...
Anabolic Steroids
Anabolic steroids are synthetic substances similar to the male hormone testosterone. Doctors prescribe them to treat problems such as delayed puberty and other medical problems that cause the body to make very low amounts of testosterone. Steroids...
Antithyroid Antibody Tests
Thyroid antibody tests measure the levels of antibodies that can destroy thyroid tissue or make the cells produce thyroid hormones. They are blood tests. Antibodies that destroy thyroid tissue can lead to hypothyroidism (underactive thyroid). Antibodies that make the cells produce thyroid hormone can lead to...
Basic Metabolic Panel
Briefly discusses basic metabolic panel, a blood test that measures your sugar (glucose) level, electrolyte and fluid balance, and kidney function. Provides links to more info on specific tests such as blood urea nitrogen, creatinine, and potassium tests.
Birth Control Hormones: The Mini-Pill
What are mini-pills? Mini-pills are used to prevent pregnancy. They release a regular dose of a hormone called progestin. They are different from regular combination birth control pills. Those contain progestin and another hormone called estrogen. Progestin prevents pregnancy in a few ways. It thickens the mucus...
Birth Control Hormones: The Patch
What is the patch? The patch is used to prevent pregnancy. It looks like a bandage and is put on the skin of your belly, rear end (buttocks), upper arm, or upper body (but not on a breast). The patch releases a regular dose of the hormones estrogen and progestin. These hormones prevent pregnancy in three ways...
Birth Control Hormones: The Pill
What are combination pills? Combination pills are used to prevent pregnancy. Most people call them "the pill." Combination pills release a regular dose of two hormones, estrogen and progestin. They prevent pregnancy in a few ways. They thicken the mucus in the cervix. This makes it hard for sperm to travel into...
Birth Control Hormones: The Ring
What is the ring? The ring is used to prevent pregnancy. It's a soft plastic ring that you put into your vagina. It's also called the vaginal ring. The ring releases a regular dose of the hormones estrogen and progestin. These hormones prevent pregnancy in three ways. They thicken the mucus in the cervix. This...
Birth Control Hormones: The Shot
What is the shot? The shot is used to prevent pregnancy. You get the shot in your upper arm or rear end (buttocks). The shot gives you a dose of the hormone progestin. The shot is often called by its brand name, Depo-Provera. Progestin prevents pregnancy in these ways: It thickens the mucus in the cervix. This...
Birth Control Pills: Missed or Skipped Periods
It is not unusual for women who are taking hormone pills for birth control to have very light periods or no bleeding at all. If you have not missed any pills, skip 1 period, yet have no other signs of early pregnancy, it is very unlikely that you are pregnant. Signs of early pregnancy include fatigue, breast...
Birth Control: How to Use the Patch
The skin (transdermal) patch is a highly effective method of birth control when it is used exactly as directed. The patch failure rate is the same as that of birth control pills. Talk to your doctor about what day to start using the patch. It is...
Birth Control: How to Use the Vaginal Ring
The vaginal ring is a highly effective method of birth control when it is used exactly as directed. The ring failure rate is the same as that of birth control pills. Talk to your doctor about what day to start using the ring. Usually, a ring is started during one of the first 5 days of the menstrual cycle. See a...
Birth Control: Pros and Cons of Hormonal Methods
The following tables list some pros and cons of using hormonal birth control methods. Combination pills, skin patch, or vaginal ring (estrogen plus progestin) Pros Cons No interruption of foreplay or intercourse Reduced bleeding and cramping with periods, which lowers the risk of anemia Fewer or no...
Black Cohosh for Menopause Symptoms
Black cohosh, also known as black snakeroot or bugbane, is a medicinal root. It is used to treat women's hormone-related symptoms, including premenstrual syndrome (PMS), menstrual cramps, and menopausal symptoms. Studies on black cohosh have had mixed results. Some studies have shown that black cohosh can relieve...
Blood Glucose
Discusses blood glucose tests used to diagnose diabetes and prediabetes. Covers types of tests, including fasting blood sugar, 2-hour postprandial blood sugar, random blood sugar, and oral glucose tolerance. Discusses how to prepare and what results mean.
Brain Natriuretic Peptide (BNP) Test
Gives info on test for BNP hormone to tell how well the heart works. Tells how BNP checks for heart failure. Tells how to get ready for test. Includes what results mean. Also discusses things that affect test results, such as some health problems and medicines.
C-Peptide
Discusses C-peptide test, used to tell the difference between type 1 or type 2 diabetes, find the cause of hypoglycemia, or check whether a pancreas tumor (insulinoma) was completely removed. Discusses how the test is done and how to prepare for it.
Calcium (Ca) in Blood
A test for calcium in the blood checks the calcium level in the body that is not stored in the bones. Calcium is the most common mineral in the body and one of the most important. The body needs it to build and fix bones and teeth, help nerves work,...
Calcium (Ca) in Urine
A test for calcium in urine is a 24-hour test that checks the amount of calcium that is passed from the body in the urine. Calcium is the most common mineral in the body and one of the most important. The body needs it to build and fix bones and teeth, help nerves work, make muscles squeeze together, help blood clot...
Carbohydrates, Proteins, Fats, and Blood Sugar
The body uses three main nutrients to function— carbohydrate, protein, and fat. These nutrients are digested into simpler compounds. Carbohydrates are used for energy (glucose). Fats are used for energy after they are broken into fatty acids....
Catecholamines in Blood
A test for catecholamines measures the amount of the hormones epinephrine, norepinephrine, and dopamine in the blood. These catecholamines are made by nerve tissue, the brain, and the adrenal glands. Catecholamines help the body respond to stress or...
Catecholamines in Urine
Catecholamines (say "kat-uh-KOH-luh-meens") are hormones made mostly by your adrenal glands as a reaction to stress. When you feel stressed, these hormones increase heart rate, blood pressure, breathing rate, muscle strength, and mental alertness. They also lower the amount of blood that goes to the skin and...
Childhood Adrenocortical Carcinoma Treatment (PDQ®): Treatment - Patient Information [NCI]
Adrenocortical carcinoma is a rare disease in which malignant (cancer) cells form in the outer layer of the adrenal gland. There are two adrenal glands. The adrenal glands are small and shaped like a triangle. One adrenal gland sits on top of each kidney. Each adrenal gland has two parts. The outer layer of the adrenal...
Childhood Multiple Endocrine Neoplasia (MEN) Syndromes Treatment (PDQ®): Treatment - Patient Information [NCI]
Multiple endocrine neoplasia (MEN) syndromes are inherited disorders that affect the endocrine system. The endocrine system is made up of glands and cells that make hormones and release them into the blood. MEN syndromes may cause hyperplasia (the growth of too many normal cells) or tumors that may be benign (not...
Childhood Pheochromocytoma and Paraganglioma Treatment (PDQ®): Treatment - Patient Information [NCI]
Pheochromocytoma forms in the adrenal gland. Pheochromocytoma forms in the adrenal gland. There are two adrenal glands, one on top of each kidney in the back of the upper abdomen. Each adrenal gland has two parts. The outer layer of the adrenal gland is the adrenal cortex. The center of the adrenal gland is the adrenal...
Childhood Thyroid Cancer Treatment (PDQ®): Treatment - Patient Information [NCI]
Thyroid cancer is a disease in which malignant (cancer) cells form in the tissues of the thyroid gland. The thyroid is a gland at the base of the throat near the trachea (windpipe). It is shaped like a butterfly, with a right lobe and a left lobe. The isthmus is a thin piece of tissue that connects the two lobes. It...
Chloride (Cl)
A chloride test measures the level of chloride in your blood or urine. Chloride is one of the most important electrolytes in the blood. It helps keep the amount of fluid inside and outside of your cells in balance. It also helps maintain proper blood volume, blood pressure, and pH of your body fluids. Tests for sodium...
Chronic Fatigue: Changing Your Schedule
You may find it helpful to change your schedule to take advantage of times when you have more energy and feel less tired. Keep a diary for a week or so, and record the times of day when you have energy and when you are tired. If there is a pattern...
Comprehensive Metabolic Panel
A comprehensive metabolic panel is a blood test that measures your sugar (glucose) level, electrolyte and fluid balance, kidney function, and liver function. Glucose is a type of sugar your body uses for energy. Electrolytes keep your body's fluids...
Cortisol in Blood
A cortisol test is done to measure the level of the hormone cortisol in the blood. The cortisol level may show problems with the adrenal glands or pituitary gland. Cortisol is made by the adrenal glands. Cortisol levels go up when the pituitary...
Cortisol in Urine
A cortisol test measures the level of the hormone cortisol in a 24-hour sample of urine. The cortisol level may show problems with the adrenal glands or the pituitary gland. Cortisol is made by the adrenal glands. Cortisol levels get higher when the pituitary gland releases adrenocorticotropic hormone (ACTH). Cortisol...
Cushing's Syndrome
Cushing's syndrome is a rare problem that happens when you have too much of the hormone cortisol in your body. Cortisol is especially important in controlling blood pressure and metabolism. But it affects almost every area of your body. Normally,...
DHEA-S Test
DHEA-S (dehydroepiandrosterone sulfate) is a male hormone (androgen) that is made in the adrenal glands. The body turns it into testosterone. A test for DHEA-S checks the level of this hormone in the blood. Testosterone affects sexual features and...
Dawn Phenomenon and the Somogyi Effect
The dawn phenomenon and the Somogyi effect cause high blood sugar levels, especially in the morning before breakfast, in people who have diabetes. The dawn phenomenon is a normal rise in blood sugar as a person's body prepares to wake up. In the...
Diabetes in Children: Checking Blood Sugar in a Child
Describes monitoring blood sugar levels in children with diabetes. Covers list of supplies needed, including blood sugar meter, testing strips, and lancet. Gives step-by-step instructions. Links to info on type 1 and type 2 diabetes.
Diabetes in Children: Counting Carbs
Teaches counting carbs to help you and your child plan meals to manage diabetes and control blood sugar. Explains why carb counting is important. Includes links to more info on counting carbs if you use insulin and on type 1 and type 2 diabetes.
Diabetes in Children: Giving Insulin Shots to a Child
If your child doesn't want to feel the insulin needle, your child's doctor can prescribe an indwelling subcutaneous cannula. A small needle is used to insert a soft tube into a place where you give your child an insulin shot, such as the belly. The needle is taken out, but the soft tube (cannula) stays in your child's...
Diabetes in Children: Preparing a Care Plan for School
A diabetes care plan will help your child's teachers and other school staff know when and how to manage your child's diabetes. For example, if your child needs to eat shortly after taking insulin or to have a snack in class, then a teacher or other adult can make sure that this happens. At the same time, the teacher...
Diabetes in Children: Preventing High Blood Sugar
Discusses high blood sugar (also called hyperglycemia) in children with diabetes. Covers symptoms. Offers tips on preventing high blood sugar emergencies. Covers when to seek emergency care.
Diabetes in Children: Treating Low Blood Sugar
Low blood sugar, also called hypoglycemia, occurs when the sugar (glucose) level in the blood of a person with diabetes drops below what the body needs to function normally. Taking too much insulin, not eating enough food or skipping meals, or...
Diabetes-Related High and Low Blood Sugar Levels
Discusses high and low blood sugar levels caused by diabetes. Suggests when to check blood sugar levels. Covers symptoms. Offers home treatment and prevention tips. Includes info on diabetes emergencies.
Diabetes: Should I Get an Insulin Pump?
Guides you through decision to get an insulin pump to manage type 1 or type 2 diabetes. Discusses who makes a good candidate for an insulin pump. Covers benefits and risks. Includes an interactive tool to help you make your decision.
Diabetic Ketoacidosis (DKA)
Diabetic ketoacidosis (DKA) is a life-threatening condition that develops when cells in the body are unable to get the sugar (glucose) they need for energy because there is not enough insulin. When the sugar cannot get into the cells, it stays in...
Emotions and Menopause
The transition to postmenopause is a normal part of the aging process. It is also a time of physical changes. You can expect some emotional responses to these changes, both positive and negative. Menopause does not create serious emotional issues for most women. Many women celebrate a sense of freedom from birth...
Endometriosis: Should I Have a Hysterectomy and Oophorectomy?
Guides you through decision to have hysterectomy and oophorectomy to treat endometriosis. Covers risks of treating and not treating. Covers how well hysterectomy and removal of ovaries works. Includes interactive tool to help you make your decision.
Endometriosis: Should I Use Hormone Therapy?
Guides you through decision to use hormone therapy to treat endometriosis. Covers how endometriosis may affect you. Covers how hormone therapy works. Lists reasons for and against hormone therapy. Includes interactive tool to help you make your decision.
Estrogens
An estrogen test measures the level of the most important estrogen hormones in a blood or urine sample. It measures estradiol, estriol, and estrone. Estradiol is the most common type of estrogen measured for nonpregnant women. The amount of estradiol in a woman's blood varies throughout her menstrual cycle. After...
Glycohemoglobin (HbA1c, A1c)
Covers blood test that checks the amount of sugar (glucose) bound to hemoglobin. Explains that test is done to check how well you are managing your diabetes. Covers how it is done and discusses results.
Growth Hormone
A growth hormone (GH) test measures the amount of human growth hormone (GH) in the blood. GH is made by the pituitary gland and is needed for growth. It plays an important role in how the body uses food for energy (metabolism). The amount of GH in...
Gynecomastia
What is gynecomastia? Gynecomastia is overdevelopment of the male breast. In response to too much estrogen (a female hormone) or too little testosterone (a male hormone), the glandular tissue of the breast swells and forms a breast bud (enlarged breast). Gynecomastia can occur in babies, teen boys, and older men...
Home Blood Glucose Test
Discusses test to measure blood sugar (glucose) levels in those who have diabetes. Covers why and how it is done. Looks at what might affect the test. Covers risks.
Hormonal Birth Control: Risk of Blood Clots
In some women, the estrogen in combination hormonal birth control methods increases the risk of a blood clot in a leg ( deep vein thrombosis, or DVT) or a blood clot in a lung ( pulmonary embolism, or PE). A blood clot in a leg vein can travel through the circulation system and cause pulmonary embolism. The risk for...
Hormone Inhibin A
The inhibin A test is done to measure the amount of this hormone in a pregnant woman's blood to see if the baby may have Down syndrome. Inhibin A is made by the placenta during pregnancy. The level of inhibin A in the blood is used in a maternal serum quadruple screening test. Generally done between 15 and 20 weeks...
Hormone Treatment for Breast Cancer
Some breast cancers need the hormones estrogen or progesterone to grow. These cancer cells have "receptors" on their surfaces. Receptors are like doorways to let hormones in. These types of breast cancer are called estrogen-receptor-positive (ER+)...
Hormones
Has info on hypothyroidism, hyperthyroidism, and thyroid tests. Also has links to info on PMS and polycystic ovary syndrome.
Hot Flashes and Menopause
A hot flash is a sudden sensation of intense body heat, often with profuse sweating and reddening of the head, neck, and chest. These symptoms can occur with mild to severe heart palpitations, anxiety, irritability and, rarely, panic. Hot flashes are the most common symptom of a woman's changing estrogen levels around...
How to Take Birth Control Pills
Birth control pills come in packs. The most common type has 3 weeks of hormone pills. Some packs have sugar pills for the fourth week. During that fourth no-hormone week, you have your menstrual period. After the fourth week (28 days), you start a new pack. Some birth control pills are packaged so that you take...
Human Chorionic Gonadotropin (HCG)
The human chorionic gonadotropin (hCG) test is done to check for the hormone hCG in blood or urine. Some hCG tests measure the exact amount. Some just check to see if the hormone is present. HCG is made by the placenta during pregnancy. The test can be used to see if a woman is pregnant. Or it can be done as part of a...
Hyperparathyroidism
What is hyperparathyroidism? Hyperparathyroidism means that one or more of your four parathyroid glands may be too active. These are tiny glands in the neck, behind the thyroid gland. When they're too active, they make too much parathyroid hormone (PTH). This hormone helps control how much calcium is in your blood...
Hyperthyroidism
Discusses hyperthyroidism and what happens to the body's metabolism if the thyroid gland is overactive. Explains how Graves' disease usually causes an overactive thyroid. Describes symptoms. Covers exams and tests to diagnose it. Provides info on treatment.
Hyperthyroidism: Graves' Ophthalmopathy
Graves' ophthalmopathy, also called thyroid eye disease, is an autoimmune disease that can occur in people with Graves' disease. In Graves' ophthalmopathy the tissues and muscles behind the eyes become swollen. The eyeballs may stick out farther...
Hyperthyroidism: Should I Use Antithyroid Medicine or Radioactive Iodine?
Guides you through decision to use antithyroid medicine or radioactive iodine to treat hyperthyroidism. List benefits for and against each of the treatments. Includes an interactive tool to help you make your decision.
Hypoglycemia (Low Blood Sugar) in People Without Diabetes
Discusses hypoglycemia (low blood sugar) in people who don't have diabetes. Explains blood sugar (glucose) in the body. Describes symptoms of mild, moderate, and severe hypoglycemia. Covers treatment for sudden episodes and emergency situations.
Hypothyroidism
Covers hypothyroidism, which happens when the thyroid doesn't make enough thyroxine (T4) and triiodothyronine (T3) hormones. Includes causes like thyroiditis. Covers tests for TSH, T4, and T3. Also includes info on treatment with medicine such as levothyroxine.
Hysterectomy and Oophorectomy: Should I Use Estrogen Therapy (ET)?
Guides you through the decision to use estrogen therapy (ET) after hysterectomy and oophorectomy. Lists the benefits and risks of ET. Suggests other treatments you can try. Includes interactive tool to help you make your decision.
Hysterectomy: Should I Also Have My Ovaries Removed?
Guides you through the decision to have your ovaries removed when you have a hysterectomy. Explains why it is done. Lists the risks and benefits of having your ovaries removed. Includes interactive tool to help you make your decision.
Infertility: Questions to Ask About Medicine or Hormone Treatment
When considering whether to try medicine or hormone treatment for infertility, ask: Whether there are any possible long-term risks related to the proposed treatment. Whether you need to change your sexual activities during treatment. Your doctor may...
Ketones
A ketone test checks for ketones in your blood or urine. Ketones are substances that are made when the body breaks down fat for energy. Normally, your body gets the energy it needs from carbohydrate in your diet. But stored fat is broken down and...
Klinefelter Syndrome
What is Klinefelter syndrome? Klinefelter syndrome is a genetic condition that affects males. Klinefelter syndrome occurs when a boy is born with one or more extra X chromosomes. Most males have one Y and one X chromosome. Having extra X chromosomes can cause a male to have a variety of physical traits. Many men...
Laparoscopic Ovarian Drilling (Ovarian Diathermy) for PCOS
Laparoscopic ovarian drilling is a surgical treatment that can trigger ovulation in women who have polycystic ovary syndrome (PCOS). Electrocautery or a laser is used to destroy parts of the ovaries. This surgery is not commonly used. But it can be...
Levothyroxine
Make sure you know about each of the medicines you take. This includes why you take it, how to take it, what you can expect while you're taking it, and any warnings about the medicine. The information provided here is general. So be sure to read the...
Living With More Than One Health Problem
Many people have more than one long-term (chronic) health problem. You may be one of them. For example, you may have high blood pressure and diabetes, or you may have high blood pressure, diabetes, and heart failure. When you have more than one problem, doctors call the health problems comorbidities. One health problem...
Low Testosterone
Men who have low testosterone do not make enough of the male hormone called testosterone. This hormone allows men to produce sperm and to develop and keep normal physical male traits. Low testosterone is also called testosterone deficiency or...
Luteinizing Hormone
A luteinizing hormone test measures the amount of luteinizing hormone (LH) in a sample of blood or urine. LH is produced by the pituitary gland. In women, LH helps regulate the menstrual cycle and egg production ( ovulation). How much LH is in a woman's body depends on the phase of her menstrual cycle. This hormone...
Melatonin
Melatonin is a hormone made by the pineal gland, a small gland in the brain. Melatonin helps control your sleep and wake cycles. Very small amounts of it are found in foods such as meats, grains, fruits, and vegetables. You can also buy it as a...
Menopause and Perimenopause
Discusses what happens in the body during menopause or perimenopause. Describes physical and emotional symptoms like hot flashes and mood swings. Discusses treatment with lifestyle changes like diet and exercise. Also covers hormone therapy.
Menopause: Managing Hot Flashes
Discusses options for managing perimenopause- and menopause-related hot flashes. Explains what hot flashes are. Discusses lifestyle changes that may help hot flashes. Looks at hormone therapy (HT) and treatment with medicines and herbs.
Menopause: Should I Use Hormone Therapy (HT)?
Guides you through the decision to use hormone therapy (HT) for menopause symptoms. Explains what menopause is and what to expect. Lists risks and benefits of HT and other treatments to try. Includes interactive tool to help you decide.
Menopause: Wild Yam and Progesterone Creams
Wild yam and progesterone creams are available without a prescription and are marketed for relieving perimenopausal symptoms. Wild yam. Although wild yam cream is marketed as a source of natural progesterone, it does not contain progesterone, and the body cannot convert it into progesterone...
Menstrual Diary to Monitor Premenstrual Symptoms
A menstrual diary is a helpful tool for better understanding your premenstrual symptoms and then deciding how to treat them. Regardless of whether you have full-blown, diagnosable premenstrual syndrome (PMS), your menstrual diary can help you plan...
Menstruation: Not Having a Period by Age 15
The menstrual cycle is the series of changes a woman's body goes through to prepare for a possible pregnancy. Most girls start having periods between the ages of 11 and 15. A girl who has not had her first period by age 15 has what is called primary...
Metabolic Syndrome
Discusses metabolic syndrome, a group of health problems that increase risk for diabetes and heart disease (coronary artery disease). Covers risk factors like obesity, high blood pressure, and high cholesterol. Covers diet and exercise to improve health.
Missed Periods and Endurance Training
If you participate in endurance sports, you may miss periods or stop menstruating. This is called secondary amenorrhea, and it occurs because your ovaries are not producing enough estrogen. It is believed that stress and low body fat contribute to amenorrhea. This is more likely to happen if you are younger and if your...
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome
What is myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)? Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) (say "my-AL-jik en-seh-fuh-loh-my-uh-LY-tus") is a disease that makes you feel so ill that you can't do your normal daily activities. Sleeping problems occur along with...
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: Getting Support
People who have chronic health problems, such as myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), often benefit from support groups. These groups can be a good source of information and tips for managing your illness and a chance to share your frustrations and problems with others who are in a similar...
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: Managing Your Energy
Two techniques can help you manage your energy when you have myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). They are: Staying within your energy envelope. Pacing yourself. These techniques can give you better control over your symptoms so that you can be as active as possible. They may also lead to...
Night Sweats
Night sweats are heavy sweating during sleep.This kind of sweating is different than the occasional sweating people have from sleeping deeply, being in a warm room, or having too many blankets. Night sweats are often so heavy that your clothing and...
Oral Glucose Tolerance Test
Discusses oral glucose tolerance test that measures glucose (blood sugar) levels. Explains that test checks for gestational diabetes, prediabetes, and diabetes. Covers the types of tests done and how to prepare for them.
Orchiectomy for Prostate Cancer
Orchiectomy is the removal of the testicles. The penis and the scrotum, the pouch of skin that holds the testicles, are left intact. An orchiectomy is done to stop most of the body's production of testosterone, which prostate cancer usually needs in...
Overnight Dexamethasone Suppression Test
The overnight dexamethasone suppression test checks to see how taking a steroid medicine called dexamethasone changes the levels of the hormone cortisol in the blood. This test checks for a condition in which large amounts of cortisol are produced...
Oxytocin
Oxytocin is a hormone released from the pituitary gland in the brain. During pregnancy, oxytocin causes labor contractions to begin. Oxytocin also is released when a woman's breasts are stimulated by suckling or pumping, causing milk to move from...
Pancreatic Cancer
Describes pancreatic cancer. Talks about symptoms and what tests are used to diagnose it. Provides treatment details. Lists factors that raise your risk.
Pancreatic Cancer Treatment (PDQ®): Treatment - Patient Information [NCI]
Pancreatic cancer is a disease in which malignant (cancer) cells form in the tissues of the pancreas. The pancreas is a gland about 6 inches long that is shaped like a thin pear lying on its side. The wider end of the pancreas is called the head, the middle section is called the body, and the narrow end is called the...
Pancreatic Neuroendocrine Tumors (Islet Cell Tumors) Treatment (PDQ®): Treatment - Patient Information [NCI]
Pancreatic neuroendocrine tumors form in hormone-making cells (islet cells) of the pancreas. The pancreas is a gland about 6 inches long that is shaped like a thin pear lying on its side. The wider end of the pancreas is called the head, the middle section is called the body, and the narrow end is called the tail. The...
Parathyroid Cancer Treatment (PDQ®): Treatment - Patient Information [NCI]
Parathyroid cancer is a rare disease in which malignant (cancer) cells form in the tissues of a parathyroid gland. The parathyroid glands are four pea-sized organs found in the neck near the thyroid gland. The parathyroid glands make parathyroid hormone (PTH or parathormone). PTH helps the body use and store calcium to...
Parathyroid Hormone
Covers why and how parathyroid hormone tests are done. Covers what possible results might mean. Includes info on what might affect the test.
Pheochromocytoma and Paraganglioma Treatment (PDQ®): Treatment - Patient Information [NCI]
Pheochromocytoma and paraganglioma are rare tumors that come from the same type of tissue. Paragangliomas form in nerve tissue in the adrenal glands and near certain blood vessels and nerves. Paragangliomas that form in the adrenal glands are called pheochromocytomas. Paragangliomas that form outside the adrenal glands...
Pituitary Tumors Treatment (PDQ®): Treatment - Patient Information [NCI]
A pituitary tumor is a growth of abnormal cells in the tissues of the pituitary gland. Pituitary tumors form in the pituitary gland, a pea-sized organ in the center of the brain, just above the back of the nose. The pituitary gland is sometimes called the "master endocrine gland" because it makes hormones that...
Polycystic Ovary Syndrome (PCOS)
Discusses polycystic ovary syndrome, a problem in which a woman's hormones are out of balance. Discusses PCOS early symptoms like heavy bleeding or facial hair. Also covers more serious symptoms like miscarriages or infertility. Includes info on treatment.
Potassium (K) in Blood
Discusses blood test to check level of potassium (K) in blood. Includes info on what affects potassium levels in the body such as kidney function, blood pH, and hormones. Explains how and why test is done. Covers what results mean.
Prediabetes
Covers warning signs that you may be at risk for type 2 diabetes. Includes causes and symptoms. Looks at lifestyle changes to get your blood sugar levels back to a normal range. Includes tips on diet, weight loss, and exercise.
Premenstrual Syndrome (PMS)
Covers symptoms of PMS such as bloating, muscle aches, and mood swings. Discusses possible causes and what increases your risk. Covers treatment with lifestyle changes, antidepressants, or birth control pills. Covers surgery for severe form (PMDD).
Progesterone
A progesterone test measures the amount of the hormone progesterone in a blood sample. Progesterone is a female hormone produced by the ovaries during release of a mature egg from an ovary (ovulation). Progesterone helps prepare the lining of the uterus (endometrium) to receive the egg if it becomes fertilized by a...
Prolactin
A prolactin test measures the level of the hormone prolactin, which is made by the pituitary gland, in your blood. Pregnant women have high levels of prolactin, which helps make breast milk. During pregnancy, prolactin levels increase by 10 to 20...
Radioactive Iodine
Radioactive iodine, given in a capsule or liquid form, is absorbed and concentrated by the thyroid gland. The treatment destroys thyroid tissue but does not harm other tissue in the body. See a picture of the thyroid gland. While radiation can cause...
Radioactive Iodine Uptake Test
A radioactive iodine uptake (RAIU) test uses a radioactive tracer and a special probe to measure how much tracer the thyroid gland absorbs from the blood. The test can show how much tracer is absorbed by the thyroid gland. The RAIU test often is...
Radioactive Iodine for Hyperthyroidism
Radioactive iodine is a medicine that you take one time. After you swallow it, it is taken up by your thyroid gland. Depending on the dosage used, the radioactivity in the iodine destroys most or all of the tissue in your thyroid gland, but it does not harm any other parts of your body. While radiation can cause...
Relieving Menstrual Pain
Discusses ways to relieve pain from menstrual cramps that usually start before or at the beginning of your period. Includes steps you can take such as applying heat on your belly or getting regular exercise. Covers over-the-counter medicines that can help.
Renin Assay
A renin assay blood test is done to find the cause of high blood pressure (hypertension). Renin is an enzyme made by special cells in the kidneys. Renin works with aldosterone (a hormone made by the adrenal glands) and several other substances to help balance sodium and potassium levels in the blood and fluid levels in...
Secondary Adrenocortical Insufficiency
Secondary adrenocortical insufficiency is a condition in which a lack of adrenocorticotropic hormone (ACTH) prevents the body from producing enough cortisol. Production of cortisol is controlled by the action of ACTH. ACTH is produced by the...
Sick-Day Guidelines for People With Diabetes
What happens when you are sick When you are sick, your body reacts by releasing hormones to fight infection. But these hormones raise blood sugar levels and at the same time make it more difficult for insulin to lower blood sugar. When you have diabetes, even a minor illness can lead to dangerously high blood sugar...
Soy for Menopause Symptoms
Soy is high in isoflavones. Isoflavones are a type of phytoestrogen. Phytoestrogens are chemicals found in plants that work like estrogens. Soy products may improve menopausal symptoms, such as hot flashes. This is based on mixed evidence. So far, studies have used many different soy sources and different...
Storing Insulin and Prefilling Syringes
Insulin can become damaged and ineffective if it is not stored properly. Unopened insulin that is packaged in small glass bottles (vials) should be stored in the refrigerator. Liquid insulin that is packaged in small cartridges (containing several doses) is more stable. These cartridges are used in...
Subclinical Hyperthyroidism
You may have a very mild form of hyperthyroidism called subclinical hyperthyroidism if your thyroid tests show that: Your thyroid-stimulating hormone (TSH) levels are low. Your thyroid hormones thyroxine (T4) and triiodothyronine (T3) are normal....
Subclinical Hypothyroidism
A doctor diagnoses mild, or subclinical, hypothyroidism through a medical history and physical exam. If your doctor suspects that you have subclinical hypothyroidism, you will have lab tests to confirm the diagnosis. Subclinical hypothyroidism is...
Symptoms of High Blood Sugar
High blood sugar (hyperglycemia) is most often seen in people who have diabetes that isn't well controlled. The symptoms of high blood sugar can be mild, moderate, or severe. If your blood sugar levels are consistently higher than your target range...
Testosterone
Make sure you know about each of the medicines you take. This includes why you take it, how to take it, what you can expect while you're taking it, and any warnings about the medicine. The information provided here is general. So be sure to read the...
Testosterone
A testosterone test checks the level of this male hormone (androgen) in the blood. Testosterone affects sexual features and development. In men, it is made in large amounts by the testicles. In both men and women, testosterone is made in small amounts by the adrenal glands, and in women, by the ovaries. The pituitary...
Thyroid Biopsy
A thyroid biopsy is a procedure in which a small sample of tissue is removed from the thyroid gland and looked at under a microscope for cancer, infection, or other thyroid problems. The thyroid gland is found in front of the windpipe (trachea),...
Thyroid Cancer
Discusses causes and symptoms of thyroid cancer. Covers factors that increase risk, including exposure to radiation. Discusses diagnosis and treatment with surgery, radioactive iodine, and thyroid hormone therapy.
Thyroid Cancer Screening (PDQ®): Screening - Patient Information [NCI]
Screening is looking for cancer before a person has any symptoms. This can help find cancer at an early stage. When abnormal tissue or cancer is found early, it may be easier to treat. By the time symptoms appear, cancer may have begun to spread. Scientists are trying to better understand which people are more likely to...
Thyroid Cancer Treatment (Adult) (PDQ®): Treatment - Patient Information [NCI]
Thyroid cancer is a disease in which malignant (cancer) cells form in the tissues of the thyroid gland. The thyroid is a gland at the base of the throat near the trachea (windpipe). It is shaped like a butterfly, with a right lobe and a left lobe. The isthmus, a thin piece of tissue, connects the two lobes. A healthy...
Thyroid Hormone Production and Function
The thyroid gland uses iodine from food to make two thyroid hormones: triiodothyronine (T3) and thyroxine (T4). It also stores these thyroid hormones and releases them as they are needed. The hypothalamus and the pituitary gland, which are located...
Thyroid Hormone Replacement for Hypothyroidism
Thyroid hormones help regulate the way the body uses energy. You need thyroid hormone replacement when you do not have enough thyroid hormones in your blood (hypothyroidism). Depending on the cause of your hypothyroidism, you may need to take...
Thyroid Hormone Tests
Looks at various tests used to check how well the thyroid gland is working. Covers what results might mean. Also looks at what might affect a test. Offers links to info on other tests that might be useful, including thyroid-stimulating hormone (TSH) test.
Thyroid Hormones
Thyroid hormones are made by the thyroid gland. The thyroid gland makes and releases two thyroid hormones: thyroxine (T4) and triiodothyronine (T3). Thyroid hormones affect every cell and all the organs of the body. Too much thyroid hormone speeds...
Thyroid Nodules
What are thyroid nodules? Thyroid nodules are growths or lumps in the thyroid gland in the front of your neck. This gland controls how your body uses energy. Most thyroid nodules are not cancer and do not cause problems. Many don't even need treatment. Sometimes a thyroid nodule can cause problems. Sometimes a nodule...
Thyroid Scan
A thyroid scan uses a radioactive tracer and a special camera to measure how much tracer the thyroid gland absorbs from the blood. The tracer can be swallowed or can be injected into a vein. It travels through your body, giving off radiation signals. The camera "sees" the signals and can measure how much...
Thyroid Storm
Thyroid storm (thyroid crisis) is a potentially life-threatening condition for people who have hyperthyroidism. Thyroid storm happens when your thyroid gland suddenly releases large amounts of thyroid hormone in a short period of time. If you have...
Thyroid Surgery
Thyroid surgery is used to treat thyroid nodules, thyroid cancer, and hyperthyroidism. During this procedure, part or all of the thyroid gland is removed. During surgery, an incision is made in the skin. The muscle and other tissues are pulled aside to expose the thyroid gland.
Thyroid Testing
Experts do not agree on whether adults who don't have symptoms should have a thyroid test. The American Thyroid Association and the American Association of Clinical Endocrinologists recommend that testing be considered for those older than age 60....
Thyroid and Parathyroid Ultrasound
Covers imaging test to check the thyroid gland and parathyroid glands. Includes info on problems test checks for, such as lumps in the thyroid gland or enlarged thyroid and parathyroid glands. Covers how it is done. Discusses possible results.
Thyroid-Stimulating Hormone (TSH)
Discusses blood test used to check for thyroid gland problems. Explains how TSH causes thyroid gland to make hormones that help control metabolism. Covers how it is done and test results.
Treating Diabetic Foot Problems
Foot problems in people with diabetes are usually treated by keeping blood sugar levels in a target blood sugar range and by using medicine, surgery, and other types of treatment. When foot problems develop, those problems need prompt treatment so...
Type 1 Diabetes
Covers type 1 diabetes, also called juvenile diabetes or insulin-dependent diabetes. Describes how pancreas regulates blood sugar (glucose) levels. Includes info on hypoglycemia and hyperglycemia. Discusses treatments, including insulin.
Type 1 Diabetes: Children Living With the Disease
Covers type 1 diabetes in children. Includes info on managing diabetes. Discusses using glucose monitors for blood glucose testing. Includes links to info on dealing with diabetes in school. Includes info on hypoglycemia and hyperglycemia.
Type 2 Diabetes
Information on type 2 diabetes. Describes how insulin is made and used by the body. Describes symptoms and how type 2 is treated. Provides info on blood sugar (glucose) levels. Discusses obesity's role in type 2 diabetes. Discusses exercise and diet.
Type 2 Diabetes: Screening for Adults
Talk with your doctor about what is putting you at risk for type 2 diabetes and how often you need to be tested. The United States Preventive Services Task Force (USPSTF) recommends testing for prediabetes and type 2 diabetes in people who are...
Types of Insulin
Insulin is used to treat people who have diabetes. Each type of insulin acts over a specific amount of time. The amount of time can be affected by exercise, diet, illness, some medicines, stress, the dose, how you take it, or where you inject it. The table below is a general guide. Your results may be different...
Types of Thyroid Cancer
There are different types of thyroid cancer. They are based on what the cells look like under a microscope. Your treatment will depend on which type of thyroid cancer you have. Papillary thyroid cancer (PTC). This is the most common type of thyroid cancer. PTC starts in cells called follicular cells and...
Unwanted Hair in Women
Hirsutism (say "HER-suh-tiz-um") is extra hair on a woman's face or body. This hair is dark and coarse. It grows in a male pattern: on the face, like a man's facial hair, or on the body, especially the chest and back. What causes hirsutism? Usually extra hair growth is not a medical problem. It can run in...
What to Do About Missed or Skipped Birth Control Pills
Birth control methods have high rates of effectiveness if they are used consistently. Follow your health professional's instructions on what to do if you miss or skip your birth control pills. Some general guidelines are listed here. Combination (estrogen plus progestin) birth control pills Always read...
Whipple Surgery for Pancreatic Cancer
Looks at a type of surgery that removes cancer from the pancreas. Covers why surgery is done and how well it works. Also covers risks.