Recently, we have opened an outpatient clinic for children’s sexual organ development, and from the consultations, about 90% of the parents reported that their children had small penises. The result of the examination is not that the child’s penis is small, but that the inflammatory narrowing of the external urethral opening caused by penile circumcision makes the foreskin opening tightly wrap around the head of the penis. The foreskin cannot be turned back to reveal the glans. This often happens with parents who do not pay enough attention to children’s penile foreskin hygiene or lack of knowledge in this area. Often 7-year-old boys are afraid of pain, and after the age of 7, boys are afraid of shame, and as a result, parents do not dare to “easily move”. The incidence of penile foreskin is quite high, according to our survey of 45 boys and 425 secondary school boys on the development of sexual organs: 45 elementary school boys, foreskin accounted for more than one-half, 425 secondary school boys have 153 foreskin. Among them, 30 were circumcised. Most had varying degrees of foreskin inflammation present. Overgrown foreskin (normal before the age of 7) can cause early membranous foreskin adhesions and prepuce inflammation if it is not frequently turned up and cleaned. If not treated in time, further fibrous adhesions may occur, causing inflammatory narrowing of the urethral opening. Some can be due to the small foreskin mouth, whenever urination can not be timely urine out of the body, the urethral opening of the foreskin expansion, causing pain in children. Therefore, the frequent stimulation of urine on the head of the penis and the foreskin on the head will produce milky white beanbag-like foreskin scale, which can cause ulcers on the foreskin glans or the formation of stones. Repeated stimulation of inflammation is also prone to penile cancer, but of course, penile cancer rarely occurs in adolescence, but it should be taken seriously. If the foreskin is too long and can be turned up, surgery is generally unnecessary. If there is a foreskin penile adhesion, after cleaning and drying (gently), apply a little eye drops of gentamycin eye ointment or other antibiotic ointment twice a week. If the adhesion is not easy to hold open, you should go to the urology department of the hospital and ask the doctor to give treatment. For those who have narrow foreskin mouth and cannot turn up the foreskin, if the infection does not occur regularly, generally do not need to operate immediately, can do circumcision after 7 years old.