Chronic fatigue syndrome (CFS) is a recently defined illness consisting of a complex of related symptoms. The most characteristic symptom is debilitating fatigue that persists for several months.
Chronic fatigue syndrome fact sheet P-42038 (PDF, 13 KB) - Hmong P-42038h (PDF, 15 KB) - Spanish P-42038s (PDF, 21 KB)
Last Revised: December 17, 2015
