The cause of blood vessel stenosis is the narrowing of the lumen of the blood vessel due to the formation of plaque from atherosclerosis. Therefore, it is necessary to strive to protect before the narrowing: 1, including the usual diet, must be light diet, try not to eat large fish and meat, while animal offal and other high cholesterol, high fat food as little as possible to prevent blood vessel blockage; 2, after the blockage of blood vessels, the routine use of drugs to prevent further aggravation. If you eat aspirin, it can fight against platelet aggregation and prevent the narrowing of blood vessel wall from further aggravating and plaque from further increasing. You can also eat statins, such as atorvastatin, which can prevent the formation of plaque in the blood vessel wall, and also help stabilize the plaque and prevent it from falling off, all of which can effectively improve the narrowing of blood vessels.