Many parents find that their children have a short penis and worry that it will affect their children’s psychological growth and future fertility. In fact, truly small penises are rare, and the vast majority belong to the occult penis. The occult penis is short in appearance, but holding the penis with your hand while pushing the skin around the penis backward can show a normal-length penis, which returns to its original shape after letting go; 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. Obesity can aggravate the degree of penile concealment. In anaphylactoid penis, the corpus cavernosum is normally developed, but the cause is a poorly developed penile meatus, which is replaced by fibrous cords that hold the penis below the pubic symphysis. The skin covering the penis is very short, especially on the dorsal side of the penis, so circumcision cannot be performed as a circumcision or circumcision, which will lead to further lack of penile skin and increase the anonymity. The hidden penis that can be turned up to reveal the head of the penis can be suspended without surgery and observed on follow-up visits. Those with narrow foreskin orifice or those with recurrent foreskin infection and difficulty in urination should be operated on. 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.