Synonyms: erectile dysfunction, erectile dysfunction, erectile weakness, impotence, erectile deficiency. Impotence refers to a man’s inability to have an erection or a weak or firm erection during sexual intercourse, unable to complete a normal sexual life or unable to insert his penis into the vagina for intercourse at all. Impotence, also known as impotence ” etc., is the most common male sexual dysfunctional disease. The occasional 1 to 2 times of failed sexual intercourse cannot be considered as suffering from impotence. Only when the failure rate of sexual intercourse exceeds 25% can impotence be diagnosed. According to foreign statistics, impotence accounts for about 37% to 42% of all male sexual dysfunction. Domestic surveys show that impotence occurs in about 10% of adult men. The incidence of impotence rises with age. After the age of 50, many men will become impotent, and the occurrence of impotence enters a peak at the age of 65-70. However, it varies from person to person and is not absolute.