Nutrition basics
Learning Center
Diarrhea
Diarrhea: Symptom — Overview covers definition, causes of acute and chronic diarrhea.
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.
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.
Abdominal pain
Everyone experiences abdominal pain from time to time. Find out when it might be cause for concern.
Painful urination (dysuria)
Learn about possible causes for pain, burning or other trouble while peeing and when to get medical help.
Kidney pain
Find out how this type of pain may feel and what health problems can cause it.
Joint pain
Pain in a joint can be a symptom of many illnesses. Most often it's caused by some type of arthritis.