The lack of erection during sex is usually indicative of erectile dysfunction, which is mainly caused by insufficient blood supply to the cavernous body of the penis. There are two main causes of erectile dysfunction in men’s sexual life: first, functional erectile dysfunction, mainly due to psychological factors, such as men’s excessive tension and anxiety during sex, repression and so on, easy to cause erectile dysfunction; second, organic causes, organic causes of common diseases, such as hypertension, diabetes, and so on, are very common in our lives. Due to the presence of hypertension, diabetes caused by penile artery vascular wall lesions, so that the penile artery lumen narrowing, resulting in insufficient blood supply to the corpus cavernosum, is a common cause of genital erectile dysfunction; third, other reasons, such as the penis itself: penile arteriovenous fistula, scleroderma of the penis, etc. can cause men to erectile dysfunction.