Constipation refers to bowel movements that are infrequent or hard to pass. Many patients defecate less than 3 times a week, and in severe cases, they defecate only once every 2-4 weeks. Excessive defecation of elderly patients can lead to changes in coronary artery and cerebral blood flow, and fainting may occur during defecation. Induce angina pectoris and myocardial infarction. Hypertension can cause cerebrovascular accidents.