The prolongation here should refer to penile lengthening surgery, the sequelae of which mainly include changes in the stability and erection angle of the penis and abnormal sensory function of the penis. 1. Stability of penis and change of erection angle: Because penis lengthening surgery is to cut off the superficial suspensory ligament and deep suspensory ligament in the penis at the appropriate position, so as to separate the cavernous body of the penis which is buried in the body, so with the passage of time, the stability of penis and the change of erection angle may occur. 2. Abnormal penile sensory function: If the surgery is not careful, causing sensory nerve damage, there may also be abnormal penile sensory function. To sum up, penile lengthening has certain surgical risks, if you need to carry out this surgery, it is recommended to go to a regular medical institution.