Dizziness, fatigue, lack of energy, want to sleep, belonging to the feeling of sleepiness, the patient is in a chronic cerebral blood supply insufficiency. With the increase of age, the development of atherosclerosis, the wall of the blood vessel will be thickened, the lumen of the blood vessel will become narrower, the blood flow into the brain will be reduced per unit of time, the brain requires a blood flow of 800-1000 ml per minute, and when it is lower than this value, the phenomenon of insufficient blood supply to the brain will occur. Patients with insufficient blood supply to the brain will experience dizziness, fatigue as well as lack of energy and sleepiness. In addition, the patient’s blood viscosity increases and similar symptoms occur. The main cause of increased blood viscosity in patients is hyperlipidemia and increased blood lipid levels. In addition, patients may have thicker blood due to chronically low water intake. Some patients may have true erythrocytosis, and some have hyperfibrinogenemia, which leads to the disease of increased blood viscosity and slow blood flow, and the same causes insufficient blood supply to the brain leading to dizziness, weakness, lack of energy, and a feeling of drowsiness.