In-depth

Definition

Iron deficiency in children

Wonder if your child is getting enough iron? Get the facts about iron deficiency in children.

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.

Shortness of breath

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

Tachycardia

Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.

Tests and diagnosis

Colonoscopy

Has your doctor recommended a colonoscopy? Here's what you need to know about preparation and the exam itself.

Hematocrit test

A hematocrit test shows what proportion of your blood is made up of red blood cells. Results may help your doctor diagnose certain diseases.

Ultrasound

Ultrasound imaging uses high-frequency sound waves to create images of structures in your body.

Upper endoscopy

Find out what to expect during your endoscopy exam.

Jan. 02, 2014