Carotid steal syndrome refers to the occlusion of the internal carotid artery on one side, the flow of the healthy internal carotid artery through the anterior communicating artery to the affected side, the flow of the healthy internal carotid artery through the anterior communicating artery to the affected side, the ischemic manifestation of the healthy internal carotid artery system, or the flow of the vertebrobasilar artery can be reversed through the posterior communicating artery to the affected internal carotid artery, the ischemic manifestation of the vertebrobasilar artery system, if the bilateral occlusion of the internal carotid artery is compensated by the vertebrobasilar and external carotid arteries. If the internal carotid artery is occluded bilaterally, the vertebral-basilar artery and external carotid artery will compensate for the blood supply, and there may be brain and cerebellum damage at the same time. How to prevent arterial blood loss? Combination of work and rest and mental regulation Avoid mental tension, worries and anxiety, have a regular life, learn to use the brain often, and avoid overuse of the brain. Reasonable diet Limit the intake of fat. The intake of animal fats (mainly containing saturated fatty acid prevention) should not be too much, and fatty meat and large oil should be prohibited. Lard, cream or other animal oils mainly contain saturated fat, and saturated fat has a negative impact on the occurrence of cardiovascular disease, can promote the absorption of cholesterol in food, and make the formation of lipoproteins easily attached to the walls of blood vessels, some can also cause the accumulation of LDL cholesterol in the blood, thus promoting the formation of atherosclerosis. Soybean oil is rich in linoleic acid and fat-soluble vitamins, etc. Modern scientific research confirms that fish oil is rich in n-3 unsaturated fatty acids, fish oil can reduce the content of triglycerides in the plasma and inhibit platelet function, thus reducing the incidence of atherosclerosis and coronary heart disease and mortality, can eat more fish meat, vegetable oil, soy products containing unsaturated fatty acids. In addition, eat less sweets and more fresh vegetables and fruits to ensure sufficient vitamins and potassium and calcium, which are beneficial nutrients and plant fiber intake. Consume a moderate amount of salt (6-8 grams/day), do not smoke, and drink less or no alcohol, etc. Physical activity Participate in physical exercise and physical activity within your ability, which can help improve blood circulation, enhance physical fitness and prevent obesity.