Masturbation does not usually lead to testicular torsion, and moderate masturbation has no adverse effects on the body, but care should be taken not to masturbate too often, which can be harmful to the genitourinary system. Testicular torsion occurs in children and young men, mostly associated with sudden violent shocks or violent sports impact. The onset of testicular torsion is rapid, with severe pain in one testicle and scrotum, and then the pain will shift to the lower abdomen and perineum, accompanied by vomiting, nausea, fever, redness and swelling. You can go to the hospital for an ultrasound examination to confirm whether there is testicular torsion. Once the testicular torsion is diagnosed, it is best to go to the emergency urology department of a regular hospital as soon as possible within twelve hours for testicular repositioning treatment. Feeling slight pain in one testicle after masturbation may be due to excessive masturbation, or prostatitis or epididymitis, and requires standardized treatment.