• Abdominal pain

    Everyone experiences abdominal pain from time to time. Find out when it might be cause for concern.

  • Anal pain

    Anal pain: Symptom — Overview covers definition, possible causes of this common symptom.

  • Ankle pain

    Learn about the possible causes of this type of pain and what to do about it.

  • Arm pain

    Arm pain: Symptom — Overview covers definition, possible causes of this symptom.

  • Back pain: Symptom

    A problem in any part of your spine can cause back pain. Here's a look at some of the causes of this common symptom.

  • Bent penis

    Learn what can cause a curved erection and when you may need to see a health care provider.

  • Bleeding during pregnancy

    Learn what may cause this type of bleeding during pregnancy and when to see a healthcare professional about it.

  • Blood clots

    Blood clots: Symptom — Overview covers definition, possible causes of this symptom.

  • Blood in semen

    This symptom can be scary, but the cause is most often not cancer. Find out possible causes and when to see a doctor.

  • Brain lesions

    Learn more about these abnormal areas sometimes seen incidentally during brain imaging.

  • Breast calcifications

    Most of these calcium buildups aren't cancer. Find out more about what can cause them and when to see a healthcare professional.

  • Breast lumps

    A breast lump could be due to something harmless. Or it could be cancer. Learn breast lump causes and find out when you need to see a health care provider.

  • Breast rash

    Overview covers the definition and possible causes of breast rashes.

  • Burning feet

    Burning feet: Symptom — Overview covers definition, possible causes and when to see a doctor for this often nerve-related symptom.

  • Cold hands

    Feeling like your hands are always cold may not be cause for concern. But sometimes a blood vessel or nerve problem is to blame. Learn the causes of cold hands.

  • Cough

    This is the body's response when the throat or airways are irritated. Coughing once in a while isn't unusual. But a long-term cough may mean a medical problem.

  • Coughing up blood

    Also called hemoptysis, this symptom can be alarming. But having sputum with a little blood isn't uncommon. A variety of conditions can cause hemoptysis.

  • Dark circles under eyes

    Overview covers causes, remedies for this common symptom.

  • Diarrhea

    Diarrhea: Symptom — Overview covers definition, causes of acute and chronic diarrhea.

  • Dizziness: Symptom

    What does it mean if you become dizzy? Learn about the various causes and when to seek treatment.

  • Dry orgasm

    It's possible for men to reach sexual climax without ejaculating. Learn about the possible causes.

  • Elbow pain

    Elbow pain: Symptom — Overview covers definition, possible causes of this symptom.

  • Elevated liver enzymes

    Inflamed liver cells can leak higher levels of liver enzymes into the bloodstream. The symptom is often mild and short-term.

  • Eosinophilia

    Learn more about a condition in which white blood cell counts are high enough to cause concern.

  • Excessive sweating

    Excessive sweating: Symptom — Overview covers definition, possible causes of this symptom.

  • Eye pain

    Have a burning, itching or throbbing eye? Find out possible causes of eye pain and when it's time to call a healthcare professional.

  • Eye twitching

    Most people experience eye twitching now and then, but it's not always harmless. Find out when these spasms might mean something more serious.

  • Fatigue

    Many conditions and lifestyle factors can cause this common symptom.

  • Foot pain

    Learn the possible causes of this symptom and what to do about it.

  • Frequent bowel movements

    Many things can trigger frequent bowel movements. Find out what may be causing your extra bathroom trips and when it's time to call a healthcare professional.

  • Frequent urination

    Learn what can make you urinate more than usual and what signs might mean it's because of something serious.

  • Green stool

    Learn about the possible causes of green stools in adults and infants.

  • Groin pain (male)

    Learn more about the causes and symptoms of this type of pain. Also find out how you can treat it at home and when to get a checkup.

  • Headache

    Headache: Symptom — Overview covers definition, possible causes of this painful symptom.

  • Heel pain

    Learn about possible causes of this common symptom and what to do about it.

  • High blood protein

    What does it mean if you have high blood proteins? Learn about the role proteins play in your body and the possible causes of this blood test result.

  • High hemoglobin count

    A high level of hemoglobin in the blood usually occurs when the body needs more oxygen, often because of smoking or living at high altitude.

  • High potassium (hyperkalemia)

    What does it mean to have high potassium? Learn about the role potassium plays in the body and the possible causes of this blood test result.

  • High red blood cell count

    Learn the possible causes of too many oxygen-transporting cells.

  • High uric acid level

    Find out possible causes of having too much uric acid in the blood.

  • High white blood cell count

    Learn the causes of this increase in disease-fighting cells in the blood.

  • Hip pain

    Learn about the causes and treatment for pain in and around the hip joint.

  • Intestinal gas

    This frequently uncomfortable symptom is part of proper digestion. Find out when it might be cause for concern.

  • Joint pain

    Pain in a joint can be a symptom of many illnesses. Most often it's caused by some type of arthritis.

  • Kidney pain

    Find out how this type of pain may feel and what health problems can cause it.

  • Knee pain: Symptom

    Knee pain: Symptom — Overview covers definition, possible causes of knee joint pain.

  • Leg pain

    Leg pain: Symptom — Overview covers definition, possible causes of this symptom.

  • Leg swelling

    Leg swelling is a common sign of fluid buildup. It might happen from standing or sitting too long. Or it might be a sign of a more serious condition.

  • Loss of smell (anosmia)

    A stuffy nose is one cause of this symptom. Learn about other causes and when it might be serious.

  • Low blood oxygen (hypoxemia)

    Learn causes of low blood oxygen and find out when to call your doctor.

  • Low hemoglobin count

    A low hemoglobin count on a blood test could be normal for you, or it could indicate that you have a condition that needs medical attention.

  • Low potassium (hypokalemia)

    Certain prescription medicines, vomiting and diarrhea are just some of the causes of low potassium.

  • Low white blood cell count

    Learn the causes of lower numbers of disease-fighting cells in the blood.

  • Lymphocytosis (high lymphocyte count)

    A brief increase in certain white blood cells, called lymphocytes, is typical after an infection. Too high a count can mean something more serious.

  • Muscle pain

    Muscle pain: Symptom — Overview covers definition, possible causes of this symptom.

  • Nasal congestion

    Learn more about what can cause a stuffy nose and how to relieve it.

  • Nausea and vomiting

    Motion sickness and drinking alcohol are among the many common causes of nausea and vomiting. Serious diseases can also have this effect.

  • Neck pain: Symptom

    Stress, strain and sitting for long hours at a computer are some of the many causes of this common pain.

  • Neutropenia (low neutrophil count)

    Learn what can cause a lack of certain white blood cells.

  • Night leg cramps

    Find out about this common nighttime pain in the calf, foot or thigh and how to ease it.

  • Night sweats

    Learn what conditions and medications might cause these sleep-disturbing sweats.

  • Nipple discharge

    Fluid leaking from the nipples isn't often a sign of breast cancer. Learn more about the possible causes and when to see a doctor.

  • Nosebleeds

    Learn about possible causes of a nosebleed, self-care steps to take if you get one and when to seek medical care.

  • Numbness

    Trauma, nervous system conditions and chronic diseases are some of the possible causes of this common symptom.

  • Numbness in hands

    Infections, chronic health conditions and nervous system conditions are possible causes of this loss of feeling in hands.

  • Painful urination (dysuria)

    Learn about possible causes for pain, burning or other trouble while peeing and when to get medical help.

  • Peeling skin

    Overview covers definition and possible causes of peeling skin. Includes photos

  • Pelvic pain

    This type of pain can be dull or sharp. You may feel it all the time or only sometimes. Learn about possible causes and when to seek care.

  • Petechiae

    Overview covers definition, possible causes of this skin symptom caused by bleeding of tiny blood vessels.

  • Protein in urine (proteinuria)

    Learn about possible causes of elevated protein levels in urine tests.

  • Rectal bleeding

    Blood in your stool, on the toilet paper or in the toilet bowl can have various causes. See your doctor if it lasts more than a day or two.

  • Red eye

    This eye condition often looks much worse than it feels. Find out possible causes of inflamed, irritated eyes and when to call the doctor.

  • Runny nose

    Learn more about how to treat this common symptom and when to see a health care provider.

  • Shortness of breath

    Trouble breathing can come on suddenly or last for weeks or longer. Most cases are due to heart or lung conditions, but there are many other causes.

  • Shoulder pain

    Shoulder pain: Symptom — Comprehensive overview covers definition, possible causes of pain in the shoulder.

  • Testicle pain

    If you're experiencing this symptom, an injury or underlying condition may be the culprit.

  • Unexplained weight loss

    Find out when losing weight without trying calls for a medical appointment.

  • Urine odor

    Urine that smells odd might point to an underlying disease or condition.

  • Vaginal bleeding

    Bleeding from your vagina that's different from your period might signal a problem. Learn about possible causes and when you should see a doctor.

  • Vaginal bleeding after sex

    This symptom might not require a checkup. But if you've gone through menopause, contact your health care team to find out the cause of bleeding from the vagina.

  • Vaginal discharge

    Learn what to expect when it comes to vaginal discharge. And know when changes in discharge might mean you should see a health care provider.

  • Vaginal dryness

    Make an appointment with your doctor if vaginal dryness is causing you discomfort.

  • Vaginal odor

    Learn about causes of unpleasant or unusual odor from the vagina and when to seek care.

  • Vomiting blood

    Vomiting blood can be a symptom of a number of serious conditions. Find out what it could mean.

  • Watery eyes

    This symptom overview covers the definition and possible causes of excess tearing.

  • Wheezing

    This high-pitched whistling sound made while breathing is often caused by asthma and chronic obstructive pulmonary disease, but there are many other causes.

  • White tongue

    This is usually harmless, but sometimes it can be a sign of serious conditions, ranging from infection to a precancerous condition.

  • Yellow tongue

    Yellow tongue: Symptom — Overview covers definition and possible causes of a yellow tongue.

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