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Chronic Fatigue Syndrome Health Center

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Chronic Fatigue Syndrome - Cause

Doctors do not know what causes chronic fatigue syndrome (CFS). Some people develop it after having a viral or bacterial infection, such as the flu, but there is no evidence to prove this link. Other theories point to the immune system, the nervous system, glands and hormones, and family history. But again, there's not enough evidence to prove any connection.

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WebMD Medical Reference from Healthwise

Last Updated: April 22, 2011
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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