The number of elderly patients with cerebral insufficiency in the community is increasing and needs to be given adequate attention. Chronic cerebral insufficiency refers to a series of dysfunctional diseases caused by ischemia and hypoxia in the brain due to various reasons. Therefore, chronic cerebral insufficiency is the “soft knife” that threatens the health of middle-aged and elderly people. 1, etiology: (1) vascular factors: atherosclerosis, hypertension, hyperlipidemia, diabetes, obesity, smoking, alcohol consumption, etc. are the risk factors that cause atherosclerosis. Next, there are arteritis, arterial stenosis, etc. (2) Hemodynamic factors: If systolic blood pressure exceeds 160 mmHg or diastolic blood pressure is lower than 80 mmHg, it will cause a decrease in cerebral blood flow. (3) Changes in blood composition: such as disorders of blood lipids, increased platelets, hypertension, and diabetes can increase blood viscosity and reduce the normal blood supply to brain tissue. (4) Microthrombosis: i.e., atherosclerotic plaque is dislodged, forming microemboli in the blood flow, blocking small blood vessels with the blood flow to the small arteries of the brain, resulting in local cerebral blood supply deficiency. 2. Common symptoms include: (1) Recurrent dizziness, lightheadedness, heavy head, headache, and drowsiness. (2) Irritability, tinnitus, impatience, irritability, insomnia, and emotional instability. 3, prevention and treatment: chronic cerebral insufficiency has serious consequences, but can be prevented, and early symptoms are reversible, the correct treatment will get better results, if tolerated delay, not timely treatment often cause serious consequences, so you should pay attention to the subtle changes in the body. If the above-mentioned symptoms occur, it means that the brain is suffering from blood supply deficiency, and timely treatment should be paid attention to.