Doctors don't know what causes
chronic fatigue syndrome (CFS). For many people, CFS symptoms start after a viral illness. In some cases, CFS seems to follow a major physical or emotional trauma or an exposure to toxins. But there is no single known cause of CFS.
Other theories point to the
immune system, glands and hormones, and family history. But again, there's not enough evidence to prove
a solid connection.
It is possible that the main title of the report Chronic Fatigue Syndrome is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.