In-depth

Causes

Sleep apnea

Sleep apnea causes people to repeatedly stop breathing during their sleep. Common signs of this sleep disorder include loud snores punctuated by periods of silence.

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.

Tests and diagnosis

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.

Mar. 03, 2011