In-depth

Cough

An occasional cough is normal and healthy. A cough that persists for weeks signals an underlying problem.

CT scan

A CT scan is an imaging test that uses X-rays to produce detailed images of the inside of your body.

Diarrhea

Here's information about common causes of diarrhea and when to see your doctor.

Fatigue

Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.

Headache

Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.

Lumbar puncture (spinal tap)

Lumbar puncture (spinal tap) — Overview covers definition, risks and results of this procedure.

Muscle pain

Muscle pain can occur just about anywhere in your body, and there are lots of potential causes.

Shortness of breath

Shortness of breath can be frightening. Most of the time, a heart or lung condition is the cause.

Jan. 02, 2014

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