Chronic Fatigue Syndrome
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 Reference immune system Opens New Window, the nervous system, glands and hormones, and family history. But again, there's not enough evidence to prove any connection.
|By:||Reference Healthwise Staff||Last Revised: Reference March 6, 2012|
|Medical Review:||Reference Anne C. Poinier, MD - Internal Medicine
Reference Nancy Greenwald, MD - Physical Medicine and Rehabilitation