1.What is occult penis? Occult penis means that the penis is hidden under the skin, and the penis looks short from the outside, but holding the penis with your hand and pushing it backward can show a normal penis body. The occult penis can be divided into: occult penis, webbed penis, bound penis, and buried penis. 2.What is the etiology of occult penis? Occult penis is a congenital malformation lesion in which the skin of the penis is not attached to the body of the penis. There are many causes of occult penis. It is usually believed that the penile meatus, which continues with the superficial fascia of the abdominal wall and the superficial fascia of the penis, is not well developed, and the meatus shortens and thickens, forming inelastic fibrous cords that do not attach to the penile shaft and restrict the extension of the penis. The penile skin is not normally attached to the penile body, making the penile skin dorsal side short and ventral side long. The inner plate is more and the outer plate is less. The subcutaneous tissue of the ventral wall and the surrounding fat are pulled distally by the dysplastic penile fascia, and the excessive prepubic fat aggravates the manifestation of occlusion. The vast majority are accompanied by prepuce. 3.What is the treatment for occult penis? Surgical treatment is recommended before school age. The main points of surgery are: (1) longitudinal incision on the dorsal side of the foreskin to flip the foreskin and then circumferential incision of the foreskin; (2) removal of the thickened contracted meatus and fibrous cords; (3) fixation of the penile skin at the root of the penis with the white membrane of the penile body; (4) for patients with short dorsal skin, it is necessary to turn the ventral tipped foreskin flap to the dorsal side to repair the defective skin.