In-depth

Symptoms

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.

Nausea and vomiting

Sick to your stomach? Nausea and vomiting usually pass quickly but sometimes result from long-term or serious conditions.

Shortness of breath

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

Sore throat

A sore throat is usually a symptom of an infectious illness, such as a cold or flu.

Tests and diagnosis

Allergy skin tests

Itching, sneezing and swelling: Find out what's causing your allergy symptoms.

CT scan

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

MRI

MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

Upper endoscopy

Find out what to expect during your endoscopy exam.

Treatments and drugs

Breast-feeding and medications

When you're breast-feeding, medications aren't necessarily off-limits — but caution is important. Get answers to common questions about breast-feeding and medications.

Jul. 02, 2013