Premature ejaculation is the most common ejaculatory dysfunction, with the incidence accounting for more than 1/3 of adult men. The definition of premature ejaculation is still controversial. It is usually evaluated by the ejaculatory latency of men or the frequency of women reaching orgasm 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 reach orgasm less than 50% of the time 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 ejaculation latency, and it is generally considered normal for a healthy male to ejaculate within 2 to 6 minutes of penile insertion into the vagina. The causes of premature ejaculation It is currently believed that the causes of premature ejaculation are not only psychological and localized penile factors, but also urological, endocrine and neurological system disease factors should be considered. There are many psychological factors that cause premature ejaculation, such as the fear of failure of sexual intercourse and emotional anxiety that many people fall into premature ejaculation for various reasons; those who habitually masturbate when they are young, always aiming to achieve orgasm quickly; lack of sexual knowledge, only to meet the male purpose; couples are not good at tacit cooperation; emotional disharmony, aversion to the spouse, intentional or unintentional sadistic consciousness; fear of sexual behavior is detrimental to health, exacerbating some inherent body The disease; too little frequency of sexual intercourse or a long period of sexual repression; and the woman’s aversion to sexual intercourse, anxiety, forced to request a quick end to the room, etc.. All of these can lead to premature ejaculation and even a chain reaction that can affect erectile capacity. Some people believe that spinal system diseases such as multiple sclerosis or spinal cord tumors, epileptic seizures or organic lesions of the cerebral cortex such as cerebrovascular accidents can cause uncontrolled ejaculation. There are also reports suggesting that diabetes, cardiovascular disease, pelvic fractures, genitourinary system diseases such as urethritis, prostatitis, vesiculitis, and prostatic hyperplasia are associated with premature ejaculation. Diagnosis of premature ejaculation Preliminary diagnosis can be made by detailed medical history and sexual life investigation, and understanding the causes of its pathogenesis can be a guide and help in treatment. Psycho-psychological analysis can be performed using psycho-psychological personality testing method SCL-90-R, etc., which helps to understand the psycho-psychological condition of the patient. Using penile vibratory sensory sensation measurement, penile dorsal nerve evoked potential and penile head sensory evoked potential measurement, and ball cavernosal reflex latency measurement method to measure changes in penile sensory sensation threshold and other changes can help to understand penile sensory sensation and the function of sensory nerves. Routine urological examinations can determine the presence of other precipitating causes such as glans penis, prostatitis, and vesicourethritis.