At present, it is clinically possible to do penile enlargement surgery for patients with congenital penile defect, congenital penile shortness or acquired penile retraction; there are three main ways of surgery, autologous fat filling, hyaluronic acid filling and free grafting. 1. Autologous fat filling: It is to extract the fat from other parts of the body and fill it into the penis by injection to achieve the purpose of thickening. This method is less traumatic, no reaction and quick recovery, but the effect is not permanent, the fat may be absorbed. 2. Hyaluronic acid filling: Hyaluronic acid is used to replace autologous fat injected into the gap between the cavernous body of the penis to fill, to achieve the purpose of thickening. Like fat filling, hyaluronic acid may be absorbed, thus affecting the effect. 3. Free grafting: Dermal fat flaps are taken from other parts of the body and transplanted to the penis after free grafting to achieve the purpose of thickening. This method is more traumatic, slower recovery, need to be hospitalized for surgery, but the surgical effect is better. It is recommended that patients should go to regular hospitals for timely consultation and examination, determine the specific treatment plan under the guidance of the doctor, and actively cooperate with the treatment.