The common reasons for daily dozing and sleepiness are mainly the following: 1, poor sleep quality, sleep is one of the important physiological activities, good sleep can effectively relieve fatigue and replenish physical strength. The patient with insomnia will be sleepy, have no energy, doze off, and also have memory loss, etc. 2, anemia, due to anemia, the patient’s hemoglobin content is reduced, resulting in reduced oxygen-carrying capacity, the patient can appear chronic lack of oxygen, manifested as sleepy, dozing, no energy, but also accompanied by pale, panic, weakness and other clinical manifestations, perfect 3. Hypothyroidism, due to the low basal metabolic rate of hypothyroidism patients, often have drowsiness, dozing performance, often accompanied by mood, emotional indifference, fear of cold clinical manifestations, improve the A gong examination can be clearly diagnosed. 4. with hypertension, diabetes, lipid abnormalities caused by blood thickening and atherosclerosis, cerebral blood supply deficiency, often appear in advanced age or have 5.If there is no organic lesion, it may be related to the subhealth state, which requires readjustment of life and work and rest routine, strengthening physical exercise and adjusting the mentality.