The main causes of sleepiness and body fatigue are as follows: 1. If the above symptoms appear in young people or middle-aged people, you need to be alert to the presence of anemia or hypothyroidism, often anemia and hypothyroidism are also accompanied by clinical manifestations of dizziness, palpitations, pallor, fear of cold, emotional and emotional indifference, etc. The diagnosis can be clearly made by perfecting blood routine and thyroid function tests. 2. If young and middle-aged people If there is no underlying disease, except for organic lesions, then it is likely that physical fatigue and sleepiness are related to the subhealth state. It is necessary to promptly adjust the dietary structure, adjust the work and rest pattern, go to bed early and wake up early, exercise appropriately, adjust the mentality and reduce the work pressure. 3, if the sleepiness and tiredness appear in the elderly or people with hypertension, diabetes, coronary heart disease and other basic diseases, then it is likely to be related to blood viscosity, arteriosclerosis, cerebral blood supply deficiency and other reasons, it is necessary to control blood pressure, blood sugar, blood lipids and other dangerous It is necessary to control the risk factors such as blood pressure, blood sugar and blood lipid, and give treatment to improve circulation and inhibit platelet aggregation.