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.¹

Go to previous section	Go to top of page	Go to next section
Author:	Robin Parks, MS	Last Updated: May 15, 2007
Medical Review:	Anne C. Poinier, MD - Internal Medicine Karin M. Lindholm, DO - Neurology
© 1995-2008 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.