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Fatigue

By Adrienne Dellwo, About.com

Updated January 28, 2009

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

Definition:

Fatigue is a condition of tiredness and reduced capacity or motivation for exertion. Fatigue is frequently accompanied by weariness, sleepiness, or irritability.

Fatigue can be either acute or chronic. In chronic fatigue syndrome, and to a lesser degree in fibromyalgia, fatigue is chronic and can be highly debilitating.

Common Misspellings: Fatique
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