Nutrition basics
Learning Center
Low potassium (hypokalemia)
Low potassium (hypokalemia): Symptom — Overview covers what can cause this blood test result.
Unexplained weight loss
Unexplained weight loss has many causes — some serious. Find out when losing weight without trying calls for a medical evaluation.
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.
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.
Wheezing
Wheezing: Symptom — Overview covers definition, possible causes of this symptom.
Headache
Headache: Symptom — Overview covers definition, possible causes of this painful symptom.
Anal pain
Anal pain: Symptom — Overview covers definition, possible causes of this common symptom.
Chart of high-fiber foods
Looking to eat more fiber every day? Here are some common foods that can help.
Heartburn or heart attack: When to worry
Chest pain? Learn the potentially lifesaving difference between heartburn and a heart attack.
Cardiac asthma: What causes it?
Wheezing isn't always due to true asthma. Sometimes it's a sign of heart failure. Know the difference.
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