The causes of coronary atherosclerosis include age, elevated blood lipids, high blood pressure, diabetes, smoking, and so on. 1. Age: it is an unchangeable factor, with the gradual increase of age, the coronary arteries will gradually appear hardening. 2. Elevated blood lipids: elevated total cholesterol, triglycerides, and low-density lipoprotein (LDL) can all contribute to the progression of atherosclerosis, and lowered high-density lipoprotein (HDL) is also a risk factor. 3. High blood pressure: This can lead to degeneration and hardening of the arterial walls, and eventually narrowing of the coronary arteries, which is an independent risk factor for coronary heart disease. 4. Diabetes mellitus: disturbances in blood sugar levels can also damage the walls of blood vessels, leading to atherosclerosis and coronary artery disease. 5. Smoking: Tobacco contains a large number of harmful substances, long-term smoking will cause serious damage to the blood vessel wall. The occurrence of coronary atherosclerosis is caused by multiple factors. To control atherosclerosis, it is necessary to control various risk factors and give treatment under the guidance of physicians.