The causes of daily sleepiness are as follows: first, seen in some patients with sleep disorders, due to poor sleep quality or insufficient sleep time, appear daily sleepiness, accompanied by inattention, etc. It is recommended that patients actively improve the quality of sleep; second, daily sleepiness is clinically seen in some patients with hyperlipidemia, blood viscosity, due to the slowing down of blood flow, there is a lack of oxygen to brain cells, manifested as sleepiness, yawning, and circumferential sleepiness. It is recommended that patients should have a low salt and low fat diet, and take oral lipid-lowering drugs if necessary; third, daily sleepiness is also seen in some elderly patients clinically, due to the reduction of melatonin secretion in the body, short sleep time at night, poor sleep quality, and daytime sleepiness, while the presence of atherosclerosis in the elderly, which slows down the blood flow, brain cells are in the process of chronic lack of oxygen, and daily sleepiness.