First of all, let’s understand the circumcision and prepuce, prepuce is the penis in a fully erect state penis foreskin covers all glans, foreskin can be turned up, while the foreskin can not be turned up is called prepuce. Some circumcised patients, the outer mouth of the foreskin often has a microscopic ring, penis weak state, the glans can be turned over to expose, after erection, the glans exposure difficulties, forcibly turned over often lead to foreskin ton, and the glans necrosis, belong to the urological male emergency, need urgent treatment! Whether circumcised or circumcised, because the usual foreskin always covers the glans, often leading to the following complications: 1, infection: because of the moist and warm environment of the foreskin cavity, bacteria can be more likely to breed here, if not timely cleaning, or combined diseases such as diabetes, often leading to foreskin infection. Repeated inflammation of the foreskin, also often leads to secondary circumcision. 2.Circumcision: due to circumcision or narrowing of the outer foreskin, the glans is congested after being exposed and cannot be returned into the foreskin cavity, and swelling and necrosis occurs. 3.Occurrence of penile cancer: the recurrent infection and inflammatory stimulation of foreskin scale and foreskin are important reasons for the occurrence of penile cancer. If the glans is exposed smoothly and the normal cleaning is timely, surgery is not needed; if inflammation of glans occurs frequently and the glans is exposed due to the presence of fiber ring at the outer opening of foreskin, surgery should be performed as early as possible. Of course, patients with prepuce are an absolute indication for surgery. However, for patients who need surgery, whether circumcision is suitable for implementation, or should first have a urological male specialist clearly diagnosed, to determine the correct mode of surgery, sometimes circumcision is too arbitrary implementation will be adverse consequences. There was a post-circumcision patient who visited our department, complaining of painful erection after surgery. After examination, the doctor found that the patient belonged to the occult penis, but the local hospital did the surgery according to the ordinary circumcision, resulting in the foreskin being too short, which led to the occurrence of the disease. The occult penis refers to the normal length and circumference of the penis, pushing the fat pad and scrotal penile junction skin penis can be normally revealed, its cause because the penile skin and penile root is poorly fixed; flesh membrane dysplasia pulling the penis; surgical scar to limit the penis exposed; too thick fat pad on the pubic bone, etc.. The common reason is that the patient is obese, especially the patient’s suprapubic fat is too thick, and the thick fat pushes the foreskin outward, resulting in the glans not being revealed. In fact, the foreskin of occult penis is not long. If the “overlong foreskin” is removed, the foreskin will be too short after erection and cause pain. The correct surgical treatment for occult penis should be orthopedic surgery for occult penis, which not only improves the appearance but also makes full use of the foreskin.