Children almost exclusively have problems with the foreskin, namely prepuce and phimosis. Circumcision is the narrowing of the opening of the foreskin so that the foreskin cannot be completely turned up. The circumcision is the foreskin that covers all or part of the head of the penis and can be completely turned up, and the circumcision may also have a narrow ring at the opening. Most of the “prepuce” in children is actually a long foreskin, which has a membranous adhesion to the head of the penis and can be turned over to expose the head of the penis. You can ask your doctor to help you gently turn up the foreskin, remove the foreskin, and apply clean medical paraffin oil to the head of the penis (to avoid inflammatory fibrous adhesions), then turn the foreskin back down (to avoid foreskin inlay edema). In the future, you can often turn it up and wash it yourself, but you still have to turn it down after washing. Over time, the narrow ring of the foreskin mouth will disappear and the head of the penis will be easily exposed. The daily cleaning of the foreskin of children can be done with water, there is no need to use soap, lotion or medicine, when red (inflammation) can be cleaned with light salt water soaking. With growth and development, the development of the penis often exceeds the lengthening of the foreskin, and the head of the penis will be completely exposed after puberty in some boys. Therefore, the surgery can be done after puberty (15-16 years old) for children with prepuce or foreskin, if it does not affect urination, but you should insist on cleaning and regular checkups to avoid inflammation as much as possible, so as to avoid inflammatory adhesions between the foreskin and the head of the penis, which can affect the results of the surgery. If it is frequently inflamed, it is time for early surgery. Circumcision in pediatric patients usually requires general anesthesia and a 2-3 day hospital stay. After puberty the surgery can be done under local anesthesia.