If it is a minor male penis is too small do not worry, is still can continue to develop; If it is an adult male needs to be treated according to the situation. 1. Underage men: need to supplement enough nutrition and strengthen physical exercise, pay attention to the glans and perineum hygiene, maintain a happy mood. 2. Adult males: If an adult male has a small penis, but can have sexual intercourse normally after erection, there is no need for treatment. If the penis cannot be erected normally or the erection is still not enough to complete sexual intercourse, then surgical treatment is needed. Commonly used methods are penis lengthening and penis enlargement. (1) Penile lengthening: By cutting the suspensory ligament of the penis, part of the corpus cavernosum hidden inside the perineum will be released in order to lengthen the penis. (2) Penile enlargement: the penis is enlarged by filling or fat flap transplantation, commonly used fillers are autologous fat, hyaluronic acid and so on. It should be noted that both penis lengthening and penis enlargement have certain risks, and the indications should be strictly grasped. Patients who are able to have normal sexual intercourse but are not satisfied with the size of their penis should be careful with the surgery, so as not to cause erectile dysfunction and other negative consequences.