Impotence, also known as erectile dysfunction (internationally referred to as ED), refers to the inability of the penis to get an erection or a weak erection when there is a sexual desire, or although there is an erection and a certain degree of hardness, it cannot maintain intercourse for a sufficient time, thus preventing intercourse or not being able to complete it. Remind the following types of people are prone to impotence: 1. People over 40 years of age Age is a risk factor for impotence, and the older you are the more common impotence is. It was found that from the age of 50 to 70, the number of people suffering from severe (complete) impotence rose from 5.1% to 15%; an increase of nearly two times. The etiology of ED is complex, and age is only a risk factor, and the likelihood of ED increases with age. However, increasing age does not mean that impotence will necessarily occur, if the physical condition of the case, erectile function and sexual life can exist throughout life. 2, people who have had heart disease or suffer from atherosclerosis Cardiovascular disease and impotence are closely related. Studies have concluded that the causes of impotence and cardiovascular diseases such as coronary heart disease, hypertension and atherosclerosis are similar. Therefore, any cause that impairs vascular function can not only cause cardiovascular diseases such as coronary heart disease, but also may cause impotence. Examples include inactivity, high blood lipids, etc. Studies have found that 39% of heart patients have impotence, and up to 64% of myocardial infarction patients have impotence. Hypertensive patients also suffer from impotence much higher than normal people. After treatment of hypertension, blood pressure decreases and the blood entering the penis decreases, thus increasing impotence. 3. Diabetic patients Diabetes is one of the most common causes of impotence. In diabetic patients, 23% to 75% of people have impotence, which is 2-5 times higher than non-diabetic patients. Diabetic impotence is characterized by heavy symptoms and is relatively difficult to treat. The main cause of diabetic impotence is damage to the nerves and blood vessels of the penis and other tissues. 4, high blood lipids and obese people Serum total cholesterol and high-density lipoprotein cholesterol levels are associated with impotence; studies have found that the higher the total serum cholesterol and the lower the high-density lipoprotein, the greater the risk of impotence. High lipids can damage the structure of blood vessel walls and cause changes in nerve function associated with erection. Most current studies suggest that dyslipidemia affects blood flow in the cavernous arteries in two main ways: first, it leads to atherosclerosis of large vessels such as the internal iliac artery, internal pubic artery and cavernous artery, which reduces blood flow in the penile arteries; second, it damages the vascular endothelium and affects vascular smooth muscle diastole during penile erection. 5, people suffering from endocrine diseases For example, about 20% of impotence patients are caused by androgen deficiency, which plays an important role in maintaining normal male libido and normal penile erectile function, androgen deficiency can cause abnormal changes in the structure and function of the penile corpus cavernosum. Other endocrine diseases, including thyroid disease and hyperprolactinemia, can cause impotence. 6, people with unhealthy lifestyles Such as smoking, alcoholism, lack of exercise, and irregular sex life are risk factors for impotence. Studies have found that the prevalence of impotence among smokers compared to non-smokers is 11% and 9.3%, respectively. Although it is not certain to say that smoking alone can cause impotence; smoking may have a synergistic effect with other factors or cause impotence by enhancing the effect of other factors.