No single cause of the illness has been identified. Infections, psychological factors and genetic influences are likely to contribute. The keys to diagnosis are recognition of the characteristic symptoms and exclusion of other possible causes.
All chronic illnesses have significant medical, psychological and social components.
CFS is not simply a form of depression or anxiety. It is not possible to predict for any individual person when the disorder will resolve. However, people with CFS who have been ill for less than two years have a high likelihood of recovery within the following two to three years. No, bed rest may temporarily ease symptoms, but will not improve the chance of recovery. If continued, bedrest may worsen and perpetuate the illness.