Premature ejaculation is the most common symptom of sexual dysfunction in men after impotence, and is one of the most misunderstood problems of normal sexual function. According to the American sexologist Kinsey’s survey of 5,300 men in the 1930s, the result was that 75% of them, had ejaculated 2 minutes after penetration. Qin Yunfeng had surveyed 234 elderly couples, of which 43, or 18.4%, had intercourse for less than 2 minutes. In 1990, McKee et al. surveyed 65 cases of men aged 18-73 years, and there was no time limit for their survey, so that premature ejaculation was recorded at any time in your life. Laumann et al. also surveyed 1422 men aged 18-58 years in 1994 with a better scientific design and found that 29% had premature ejaculation. This statistical estimate is more reasonable. This indicates that premature ejaculation is the most common male sexual dysfunction, both abroad and at home. But what most people call premature ejaculation actually refers to premature ejaculation, which is not up to such a long time, so to what extent is premature ejaculation early considered premature ejaculation? At present, most experts and scholars believe that: during sexual intercourse, before the man’s erect penis is inserted into the woman’s vagina, or just when it enters, or just after it is inserted, ejaculation occurs and the penis then shrinks and softens, so that sexual intercourse cannot continue and is aborted is called premature ejaculation. Some people also believe that ejaculation after the penis enters the vagina and is in motion for less than a minute, or ejaculation after less than 15 strokes of the penis in the vagina, can be called premature ejaculation. In short, premature ejaculation is manifested as premature and rapid ejaculation after erection within a certain period of time, thus affecting sexual life and sexual satisfaction of both parties. However, it is worth pointing out that any ejaculation that can last more than 1 minute and cannot be maintained to the climax of female pleasure is mostly a result of poor coordination between the two parties in tacit harmony, as long as the man is not alone, or never considerate and loving to the woman, then it must be a result of inexperienced sexual intercourse, or not knowing the secret of coordination, or not mastering the sexual techniques. In addition, the woman can not get sexual pleasure to determine whether the man is premature ejaculation, because the woman’s sexual pleasure is also related to a variety of other factors, such as the mood of the woman, the male caress, after the warmth, the position of sexual intercourse. As for the duration of sexual intercourse is also closely related to age, physical strength, sexual experience, sexual position, penis pumping amplitude, frequency and the sexual response of women. Even if the same person in each sexual intercourse ejaculation fast and slow is not the same, such as the first time newlyweds, reunited after a long time after marriage, or abstinence for a long time after the first sexual intercourse, due to excessive male excitement, ejaculation occurs very quickly, and even premature ejaculation, which is completely normal, do not worry, with the number of sexual intercourse increased, will adjust to the normal level. It can also be improved by sexual ability training, both sides to strengthen close cooperation, and achieve mutual satisfaction, sexual life harmony. To check whether you belong to premature ejaculation to do what examination? The items and reference prices are as follows: 1. Prostate B ultrasound The normal prostate sonogram is corn-shaped in cross-section, with a smooth halo of envelope and tiny hypoechoic, evenly distributed interior, with a small halo in the center for the urethra. The ultrasound examination of the prostate helps to determine the location, size, morphology and extent of intraglandular invasion of prostate cancer, which facilitates the diagnosis of premature ejaculation caused by prostate disease. The normal prostate fluid examination is milky white and alkaline. Under high magnification, you can see a full field of tiny, refractive lecithin granules, a few epithelial cells, amyloid bodies and spermatozoa, and the number of white blood cells is greater than ten. 3, male sex hormone three tests male sex hormone test including follicle stimulating hormone, luteinizing hormone, testosterone. Male sex hormone test is mainly used for the diagnosis of erectile dysfunction (commonly known as impotence) and oligospermia, azoospermia, and also for the diagnosis of male hyperprolactinemia, male menopause, etc. 4.Sexual nerve function test Scientific diagnosis for premature ejaculation can identify the root cause of premature ejaculation from the sexual nerve perspective, and can precisely determine the degree of premature ejaculation, and then select the treatment method for premature ejaculation according to the cause in a targeted manner.