Premature ejaculation (prospermia) is the most common ejaculatory dysfunction, mainly manifested by ejaculation at the beginning of sexual intercourse, or even ejaculation before sexual intercourse, which prevents normal sexual life. The definition of premature ejaculation is still controversial and is usually evaluated by the ejaculatory latency of men or the frequency of orgasm of women during sexual intercourse, such as the standard that men lose the ability to control ejaculation during sexual intercourse and ejaculate before or just after penile insertion into the vagina; or the standard that women achieve less than 50% of orgasm during sexual intercourse to define premature ejaculation, but these are not universally accepted. The ejaculatory latency of men is affected by age, length of abstinence, physical condition, emotional psychology and other factors, while the frequency of female orgasm is also affected by physical state, emotional changes and the surrounding environment. In addition, there are individual differences in the length of ejaculatory latency. It is generally considered normal for a healthy male to ejaculate after 2 to 6 minutes of penile penetration into the vagina. Premature ejaculation is a generic term that varies from population to population and is generally divided into the following categories: 1. Habitual premature ejaculation refers to male paper that consistently ejaculates prematurely during sexual intercourse after adulthood, the sexual physiology of such people is normal and the penis erection is strong. The symptoms are high sexual desire and impatience for coitus, mostly seen in young adults. 2, old age premature ejaculation, is caused by sexual function decline, after middle age or older people because of the decline of physical function and gradually occurring early ejaculation time, often accompanied by decreased sexual desire and penile erection weakness.