<unk>  is common in the general population and often caused by overwork, too much activity or a specific illness or disease. Around 20% of patients who visit their clinician report<unk> . Prolonged<unk>  is<unk>  that persists for more than a month, and<unk><unk>  is<unk>  that lasts at least six consecutive months.<unk>  affects between 0.62% and 6.42% of patients, with females more likely to be affected than men. Age at onset is typically between age 15 and 24, or over 60 years of age. A significant number of patients present with<unk>  as part of a mix of symptoms, while others present with a primary problem of<unk>  alone.
Idiopathic chronic fatigue
Fatigue
Cancer-related fatigue
Chronic fatigue syndrome
Occupational burnout
Functional somatic syndrome
Medication phobia
Nicotine dependence