The concept of occult penis: occult penis is a more common congenital penile development abnormality in male medicine, also known as buried penis. The body of the penis is shrunken and hidden in the body, and the only thing that protrudes out is the pointed foreskin, which is shaped like a “bird’s beak”, and the body of the penis cannot be touched. If you squeeze the penis skin inward, the penis body will be revealed, the development of the penis body is not significantly different from the same age, but after the hand is released, the penis body is retracted, again deformed into a “beak-like”. Causes: In infancy, the normal penile meatus can make the penis body slide freely in the deep subcutaneous layer, but in anaphylactic penis, the meatus lacks this elasticity, the penile skin is not fixed in the deep fascia, and the extension of the penis is limited. Differential diagnosis: occult penis mainly needs to be distinguished from small penis, buried penis caused by obesity, webbed penis and prepuce. The ratio of penile body length to penile circumference is normal in micropenis. Clinically, it can be seen that the penile body is small, erection is less and erection is weak, and the androgen level may also be lower than that of the same age. Patients with buried penis caused by obesity have obesity manifestations. Webbed penis, also known as penile scrotal fusion, refers to the fusion of the skin of the mid-scrotal suture with the ventral skin of the penis, so that the penis and scrotum are not completely separated prepuce is a narrow foreskin opening resulting in the head of the penis not being exposed. Treatment: At present, there is still controversy about whether, when and how to treat occult penis. At present, the main treatment method for occult penis is surgery.