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Fatigue

Fatigue is a feeling of tiredness or exhaustion or a need to rest because of lack of energy or strength.

Fatigue may result from overwork, poor sleep, worry, boredom, or lack of exercise. It is a symptom that may be caused by illness, medicine, or medical treatment such as chemotherapy. Anxiety or depression can also cause fatigue.

By Healthwise Staff
Primary Medical Reviewer William H. Blahd, Jr., MD, FACEP - Emergency Medicine
Specialist Medical Reviewer H. Michael O'Connor, MD - Emergency Medicine
Last Revised January 12, 2011

WebMD Medical Reference from Healthwise

Last Updated: January 12, 2011
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