Myalgic encephalomyelitis
Chronic fatigue syndrome (CFS) causes persistent fatigue (exhaustion) that affects everyday life and doesn't go away with sleep or rest.
The symptoms of chronic fatigue syndrome (CFS) vary from person to person. There are often periods when they are better or worse.
Exactly what causes chronic fatigue syndrome (CFS) is unknown, but there are several theories.
There is no test for chronic fatigue syndrome (CFS), but there are clear guidelines to help doctors diagnose it.
There is no cure for chronic fatigue syndrome (CFS), but treatments can help relieve the symptoms.