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Symptoms

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Abdominal pain

Abdominal pain: Symptom — Overview covers definition, causes of abdominal pain, including lower abdominal pain.

Anal pain

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

Ankle pain

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

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 doctor.

Bleeding during pregnancy

Learn what may cause vaginal bleeding during pregnancy and when you should see a doctor about it.

Blood clots

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

Blood in semen

Finding blood in your semen can be alarming, but the cause is usually benign. 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 breast calcifications are benign. Find out more about what can cause them, what they look like, and when to see a doctor.

Breast lumps

A breast lump can result from a harmless condition. Or it could be cancer. Understand breast lump causes and when you need to see a doctor.

Breast rash

Overview covers definition, 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

Cold hands may not be cause for concern. But persistent cold hands may be due to a blood vessel or nerve problem. Learn about the possible causes.

Cough

Cough: Symptom — Your body's response when something irritates your throat or airways and possible causes of this symptom.

Coughing up blood

Coughing up blood: Symptom — Comprehensive overview covers possible causes of coughing up blood.

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 have bouts of dizziness? Learn about the many possible 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 abnormal amounts of liver enzymes into the bloodstream. The symptom is often mild and temporary.

Eosinophilia

Learn more about a condition in which white blood cell counts are elevated beyond normal limits.

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 the doctor.

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

Fatigue can result from many conditions — such as fibromyalgia or sleep apnea — or lifestyle factors — such as alcohol use or medication side effects.

Foot pain

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

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 your health care provider.

Frequent urination

Frequent urination: Symptom — Overview covers definition, possible causes of the need to urinate more than usual.

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 groin pain, including when to see a doctor and how you can treat it at home.

Headache

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

Heel pain

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

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

An above-normal level of hemoglobin in your blood usually occurs when your body needs more oxygen, often because you smoke or live at high altitude.

High potassium (hyperkalemia)

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

High red blood cell count

High red blood cell count: Symptom —Overview covers possible causes of excessive oxygen-transporting cells.

High uric acid level

High uric acid level: Symptom — Overview covers definition, possible causes of this symptom.

High white blood cell count

High white blood cell count: Symptom — Overview covers possible causes of increased disease-fighting cells.

Hip pain

Hip pain: Symptom — Overview covers definition, possible causes of hip joint pain.

Hypoxemia (low blood oxygen)

Hypoxemia: Symptom — Overview covers definition, possible causes, treatment of low blood oxygen.

Intestinal gas

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

Joint pain

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

Kidney pain

Kidney pain: Symptom — Overview covers definition and causes of kidney pain.

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

A common sign of fluid retention, leg swelling might be from standing or sitting too long. Or it might indicate a more serious condition.

Loss of smell (anosmia)

Learn about the definition and possible causes of loss of smell (anosmia).

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)

Low potassium (hypokalemia): Symptom — Overview covers what can cause this blood test result.

Low white blood cell count

Low white blood cell count: Symptom — Overview covers possible causes of decreased disease-fighting cells.

Lymphocytosis (high lymphocyte count)

A temporary increase in certain white blood cells, called lymphocytes, is normal 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 the possible causes of 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)

Neutropenia: Symptom — Overview covers definition, possible causes of a lack of certain white blood cells.

Night leg cramps

Night leg cramps: Symptom — Overview covers definition, possible causes of this painful symptom.

Night sweats

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

Nipple discharge

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

Nosebleeds

Nosebleeds: Symptom — Comprehensive overview covers definition, possible causes of nosebleeds.

Numbness

Trauma, neurologic disorders and chronic diseases are some of the possible causes of this common symptom.

Numbness in hands

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

Painful urination (dysuria)

Learn about possible causes for pain, burning or other discomfort during urination and when you might need to see a doctor.

Peeling skin

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

Pelvic pain

Pelvic pain can be dull or sharp, constant or intermittent. Learn about possible causes and when to see a doctor.

Petechiae

Petechiae: Symptom — Overview covers definition, possible causes of this skin symptom.

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

Red eye 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 your doctor.

Shortness of breath

Problems 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

Unexplained weight loss has many causes — some serious. Find out when losing weight without trying calls for a medical evaluation.

Urine odor

Unusual urine odor might be an indicator of an underlying disease or condition.

Vaginal bleeding

Vaginal bleeding that's unrelated to your period might signal a problem. Learn about possible causes and when you should see a doctor.

Vaginal bleeding after sex

Vaginal bleeding after sex might not require a doctor's visit, but if you're postmenopausal, contact your doctor to find out the cause of vaginal bleeding.

Vaginal discharge

Learn what's normal when it comes to vaginal discharge, and understand when changes in discharge might mean you should see a doctor.

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

Watery eyes: Symptom — Overview covers definition, possible causes of excess tearing.

Wheezing

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

White tongue

White tongue: Symptom — Learn about the definition and possible causes of this usually harmless symptom.

Yellow tongue

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