Atherosclerosis is a long-term chronic progressive disease, and the symptoms of atherosclerosis are completely different due to the fact that it occurs in different parts of the body, depending mainly on its severity and location of occurrence. 1, the severity of atherosclerosis: (1) Early atherosclerosis does not have any symptoms, and healthy people may also have different degrees of atherosclerosis, which often does not cause any disease or symptoms due to slow progression. (2) Severe atherosclerosis often causes different symptoms, and its symptoms mainly depend on the degree of ischemia and the rate of progression of the vascular lesion and the involved organs: the more severe the ischemia, the more severe the symptoms; acute ischemia tends to be more symptomatic, and chronic ischemia, for which the body can compensate through collateral circulation and other means, is relatively less symptomatic. 2, the onset of atherosclerosis sites: (1) aortic atherosclerosis: often no specific symptoms, once the aortic coarctation, aortic aneurysm can produce severe chest pain, abdominal pain symptoms, and even sudden death; (2) coronary atherosclerosis: is what we call coronary heart disease, if the diameter of the narrowing of more than 70%, angina pectoris, myocardial infarction, induced arrhythmia, heart failure, and even sudden death; (3) (3) cerebral atherosclerosis: it can cause cerebral ischemia, cerebral infarction, cerebral hemorrhage, cerebral atrophy, and affect mental, emotional and memory; (4) renal atherosclerosis: severe renal artery stenosis can lead to secondary hypertension and may also cause renal insufficiency; (5) lower limb atherosclerosis: intermittent claudication and even limb necrosis can occur in severe stenosis. Although there may be no clinical symptoms in the early stage of atherosclerosis, if it is allowed to develop, it will cause damage to the heart, brain, kidney and the blood vessels and organs of the whole body, so it should be prevented at an early stage.