Drowsiness every day is usually due to the following four reasons: First, the most common reason is the body’s blood viscosity and lipid content is too high and lead to hypertriglyceridemia, hypercholesterolemia and blood viscosity in the high cut value is too high, and triggered by sleepiness, sleepiness, fatigue and other clinical symptoms. Second, the body lack of oxygen and triggered, usually to the brain lack of oxygen is the most significant, the brain lack of oxygen when the body’s ability to supply oxygen is insufficient, arterial blood oxygen saturation is reduced, the partial pressure of carbon dioxide is too high, the partial pressure of oxygen is low, so the brain cell ischemia can not be metabolized normally synthesis products will lead to sleepiness every day. Third, the arterial blood supply insufficiency is related, because the vertebral basilar artery blood supply insufficiency and the cardiac aorta blood supply insufficiency have certain factors. Fourth, the deficiency evidence, such as women’s blood deficiency, men’s kidney deficiency have a certain relationship.