Occult penis is a congenital genital malformation in which the penile body develops normally but reveals abnormally. The prevalence is 0.67% and it often occurs in obese children and is easily misdiagnosed as circumcision. Below, we will learn more about what exactly is occult penis. What is occult penis? Occult penis means that the penis is buried under the skin, and the penis body is mostly separated from the foreskin. The penis is short in appearance and the outer opening of the foreskin looks like a bird’s beak. When the penis is held in the hand and the surrounding skin is pushed back, the penis body can be revealed. However, most of the foreskin cannot be turned up to reveal the glans, so it is easily treated as prepuce or prepuce. In clinical practice, it is more common in obese children. Patients often visit the clinic because of the small appearance of the penis, difficulty in urination or wet pants. The cause of occult penis is that during embryonic development, due to factors such as separation of the penile skin from the penile body, abnormal development of the meatus membrane, and abnormal location of the attachment of the suspensory ligament to the penis, the penis cannot extend outward normally, and the penile body is completely or partially hidden in the subcutaneous fatty tissue in front of the pubic bone. In severe cases, all that can be seen is an empty foreskin. Cryptorchidism is a relatively rare congenital genital malformation, but its incidence has increased significantly in recent years, which is related to the excessive intake of high-calorie fried foods or fast foods by children nowadays. A large amount of fatty tissue accumulates around the penis due to obesity, pushing the penile foreskin forward, causing the penile body to separate from the foreskin and the penile body to be buried in fat to form the occult penis. Clinical manifestations: occult penis mainly manifests as short penis appearance, but holding the penis by hand while pushing the skin around the penis backward, it can show the normal length penis, and after letting go of the penis, it returns to the original shape; the foreskin opening is small and upturned; fat accumulates in front of the pubic bone, and the whole appearance resembles a small mound. It should be mainly distinguished from small penis, prepuce, obesity, etc. It is commonly misdiagnosed as small penis and given hormone treatment or circumcision treatment for circumcision, and obesity can aggravate the degree of occult penis. In anaphylactic penis, the corpus cavernosum is normally developed, but the cause of the disease is that the penile meatus is poorly developed and is replaced by fibrous cords, which hold the penis below the pubic symphysis. The skin covering the penis is very short, especially the skin on the dorsal side of the penis and the outer plate of the foreskin, so it cannot be treated as a circumcision for circumcision or circumcision, which will lead to a further lack of penile skin and aggravation of anonymity. Treatment: The surgery should be performed on those with narrow foreskin or recurrent foreskin infection and difficulty in urination, and the surgery is usually done before school age at the age of 3~5. The purpose of surgery is to enlarge the foreskin opening and reveal the head of the penis; to loosen and reveal the penile body, so that the penis can regain its normal length and develop normally. The surgery requires excision of the fibrous tissue of the fleshy layer of the penis and reshaping of the penile skin. The efficacy of anaplasty is remarkable and immediate. The main postoperative complication is foreskin edema, but it can gradually subside on its own.