Chronic Fatigue Syndrome

CFS, short for chronic fatigue syndrome, is a physically debilitating and complex disorder characterized by profound fatigue (tiredness) that is not improved by rest and can get worse with any physical or mental activity. People with CFS function at a much lower level of activity than they were capable of before the onset of illness. Other symptoms of CFS can include weakness, muscle pain, impaired memory, lower mental concentration, and even insomnia. In some cases, CFS can persist for years. The cause or causes of CFS have not been identified and no specific diagnostic tests are available. Diagnosis and treatment can be difficult so it is best to consult with a doctor for help. Learn more about the condition of chronic fatigue syndrome with information on causes, symptoms, history, and treatments.