[1][5] A 1994 definition of ICF was a physical medical condition of unknown origin, persisting or relapsing for a minimum of six consecutive months, where CFS symptoms are not met.
[12] ICF differs from other forms of chronic fatigue since it is unexplained rather than linked to a medical or psychological illness (for example, diabetes or depression).
[14] The recovery rate within a year is significantly higher for ICF patients at 30–50% compared to under 10% in CFS.
[19][20] It also is no longer included as a diagnosis in the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders.
[21] Idiopathic chronic fatigue is typically managed in general medicine rather than by referral to a specialist.
[24] Management may involve a form of counseling, or antidepressant medication, although some patients may prefer herbal or alternative remedies.
[1] A form of counseling known as cognitive behavioral therapy may help some people manage or cope with idiopathic chronic fatigue.
[1][25] Fatigue is common in the general population and often caused by overwork, too much activity or a specific illness or disease.