Excessive masturbation may lead to urethritis, excessive female masturbation may also induce bacterial vaginitis, excessive male masturbation may induce prostatitis, premature ejaculation and other diseases. 1. Urethritis: excessive masturbation may bring germs into the urethra, thus inducing urethritis, and the patient may experience frequent urination, urgency, redness and swelling of the urethral opening and other symptoms. 2. Bacterial vaginitis: Bacterial vaginitis is a kind of mixed vaginal infection. When women masturbate, if they don’t clean their hands, the bacteria from their hands may enter the vagina, leading to bacterial vaginitis, which may cause symptoms such as increased vaginal discharge and discharge with a fishy odor. 3. Prostatitis: Prostatitis includes acute and chronic inflammation of the prostate gland. Excessive masturbation may cause the prostate gland to be congested for a long period of time, so that the prostate fluid cannot be normally secreted and excreted, thus leading to prostatitis, and the patient will experience frequent urination and urinary urgency. 4. Premature ejaculation: Premature ejaculation is a male sexual dysfunction disease, male masturbation may lead to excessive nerve center of the brain is in a state of excitement for a long time, thus affecting the sexual function, the phenomenon of premature ejaculation, the performance of the short period of time of cohabitation, can’t independently control the discharge of semen, and so on. Men and women should avoid excessive masturbation, but also need to control the frequency of coitus, once the symptoms of discomfort, should be examined and treated in a timely manner to avoid delaying the condition.