In-depth

Complications

Mitral valve stenosis

Lifestyle and home remedies

How much sleep do you really need?

The usual advice is eight hours a night, but many factors, such as age and genetics, influence how much shut-eye you need.

Risk factors

Secondhand smoke

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.

Symptom Checker

Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.

Wheezing

Tests and diagnosis

Chest X-rays

April 01, 2014