Chronic fatigue syndrome (CFS) is a disorder characterized by extreme fatigue that is unrelated to any underlying conditions. Fatigue experienced by those affected is frequently made worse by additional physical or mental activity and is not improved by rest.
CFS Also known as myalgic encephalomyelitis (ME) and systemic intolerance disease (SEID). While chronic fatigue is a common symptom among these definitions of the disorder, there may be other...