Chronic Fatigue Syndrome Index

Featured: Chronic Fatigue Syndrome (CFS or SEID) Main Article

Chronic fatigue syndrome (CFS) or systemic exertion intolerance disease (SEID) is a debilitating and complex disorder characterized by profound fatigue that lasts six months or longer, is not improved by bed rest, and may be worsened by physical or mental activity.

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Terms related to Chronic Fatigue Syndrome:

  • CFIDS
  • Chronic Fatigue and Immune Dysfunction Syndrome
  • Myalgic Encephalomyelitis
  • Postviral Fatigue Syndrome