Fatigue is a subjective sensation of discomfort and aversion to activity, with an objective alteration of usual performance. Fatigue affects 5 to 20 % of the general population and is 5 to 10 % of the reasons consulting general medicine. Factors predisposing, precipitating and perpetuating the fatigueDans rare cases, fatigue revealed an underlying disease jacenteExamens biological fatigueLa fatigue: a symptom of hygiene vieFacteurs of predisposing, precipitating and perpetuating factors predispose to the fatigueCertains symptom of fatigue: sex female and an antecedent of fatigue or depression. Others rush as physical hyperactivity, infections, certain psychological disorders such as bereavement, stress or a social problem professional. And finally, factors perpetuating fatigue as physical inactivity, emotional disorders, psychological disorders or stress, sleep disorders. .
In rare cases, fatigue revealed an underlying disease jacenteDans less than 10 % of cases, there are associated fatigue has an underlying disease: general causes: anemia, chronic infection, autoimmune disease, cancer, endocrine disease: diabetes, hypothyroidism, sleep disorders: sleep apnea and other sleep disorders, neuromuscular disorders: myositis (inflammation of muscle tissue streak), multiple sclerosis, gastrointestinal disease: liver disease (liver disease and biliary tract) disease cardiovascular: congestive heart failure, respiratory disease: chronic respiratory insufficiency ; rheumatology: ankylosing spondylitis. Fatigue can occur in various psychiatric disorders such as depression, anxiety, panic attacks, and eating disorders, etc. The chronic fatigue syndrome, on the border of fibromyalgia, represents more than 2 % of the clientele of general medicine.