The harm of arteriosclerosis is mainly that its blood supply function is affected, which leads to insufficient blood supply and induces various ischemic and hypoxic diseases. Coronary atherosclerosis will lead to myocardial ischemia, hypoxia or necrosis, which will lead to coronary heart disease and cardiomyopathy. Some arteriosclerosis in the brain can cause cerebrovascular accidents such as cerebral embolism, and long-term chronic ischemia can cause brain atrophy and even develop into vascular dementia. Renal arteriosclerosis can cause intractable hypertension and renal artery thrombosis. Long-term ischemia can lead to renal atrophy, develop into chronic renal failure and decrease renal function. Mesenteric arteriosclerosis can lead to symptoms of indigestion, constipation and diarrhea. The onset of this symptom in the elderly is very secret and easy to be ignored by clinicians. Because the elderly's perception and feedback on many diseases have declined, many diseases are not easy to be found in time. Intestinal wall necrosis can cause bloody stool, paralytic intestinal obstruction and shock, which can be life-threatening.