12-year-old boy circumcision, such as the presence of foreskin need surgical treatment, if it is simple circumcision can choose conservative treatment. 1. Surgical treatment: If the glans cannot be exposed due to the prepuce, you can consider circumcision, because the prepuce will affect the development of the penis, resulting in a short penis. 2. Conservative treatment: If it is simple circumcision, you can choose conservative treatment, usually pay attention to personal hygiene, often turn the foreskin for cleaning, so as not to cause the growth of foreskin scale, which can cause circumcision and glansitis. Circumcision can treat recurrent infections of the foreskin and glans. A 12-year-old boy with a long foreskin and a glans that can’t be exposed can consult with a urologist or a gynecologist, and be treated under a doctor’s guidance.