Vascular stenosis may be caused by excessive plaque buildup, poor diet, lack of physical activity and other factors. 1. Excessive plaque buildup: Plaque is composed of cholesterol and other deposits in the arteries. If plaque builds up on the arterial wall, it will lead to constant narrowing of the lumen of the blood vessels, which may result in partial or complete blockage of the blood vessels and stenosis of the blood vessels. 2. Improper diet: If you eat a lot of saturated fat, trans fat, high salt, high sugar food for a long time, it may also lead to the deposition of fats and oils on the walls of blood vessels, resulting in stenosis. 3. Lack of physical activity: Exercise can encourage the body to expel excess cholesterol from the body and prevent cholesterol from being deposited on the inner walls of blood vessels. However, lack of physical activity may lead to obesity and accumulation of cholesterol in the blood vessel walls, thus inducing blood vessel stenosis. If the patient has a narrowing of blood vessels, it is necessary to go to a regular hospital for relevant examinations. And actively cooperate with the doctor to take relevant treatment measures, so as not to delay the condition.