Impotence refers to the inability of a man to have an erection, or a weak or short erection, to have normal sexual intercourse, or the inability of the penis to penetrate the vagina for sexual intercourse. The etiology of impotence is complex and the research on the pathological mechanism is being gradually improved, and the exact pathogenesis is not yet clear. According to the causes of impotence, it can be divided into three categories: psychological, organic and medical. 1, psychological (psychogenic, psychiatric): psychological impotence accounts for about 85-90% of the total impotence, is the most common sexual dysfunctional disease. After examination, the patient does not have any organic disease causing sexual dysfunction, but the penis cannot be erected during sexual intercourse, but the penis can be erected during masturbation in some non-sexual activities, such as in dreams or reading some sexually stimulating books and magazines, movies, and when the bladder is full of urine. The mechanism of psychological impotence may be due to a variety of psychological factors that interfere with the sexual center of the brain, so that the sexual nerve center of the brain does not get enough excitement. 2, organic: Although organic impotence only accounts for about 10-15% of the total number of impotence, but its causes are more, the pathology is complex, in general, no more than congenital abnormalities, diseases, drug effects, medical sources and other aspects of the cause. 3, medical origin: impotence due to the doctor’s reasons also happens in clinical practice. This may be due to the doctor’s carelessness or too detailed explanation to the erectile dysfunction, or the patient may have misunderstood the doctor’s explanation, guidance. There are cases where impotence occurs in the course of treatment of other diseases. In addition, the patient’s misunderstanding of the sexual knowledge introduced by the relevant books and magazines and some misinformation can also cause impotence. It is recommended that you go to a regular hospital for examination to understand the cause before treatment.