A teenage masturbation patient came to the clinic today with a day of swelling and pain in the penis. Due to excessive masturbation, the foreskin was not turned up in time, resulting in foreskin impaction, edema of the glans and foreskin, swelling and translucency, and the penis at the coronal sulcus resembling a rubber band tightening. Such cases are common. It is necessary to educate the public on this subject. The ingrown penis could not be repositioned by loosening, but fortunately the foreskin and glans blood flow was still good, and the specialist was able to perform a timely ingrown penile incision and decompression after a week of complete recovery. The lesson is worth learning and warning for those who have this behavior! Li Zhengming, urology department of Guangzhou Red Cross Hospital, hereby specially reminds: those who have long foreskin or prepuce, after masturbation to meet the pleasure, have foreskin upturned can not return by themselves, remember to reset the foreskin in time, so as to avoid foreskin too narrow leading to foreskin embedded, and then trigger glans ischemic necrosis and damage. The most important thing is to provide medical advice for such teenage friends: timely circumcision to eliminate future problems. The masturbation pleasure is purely normal physiology, there is no excuse, advocate appropriate, not excessive. The pain, do not forget to return to the natural, so as not to miss the male root, regret for life.