After 20 days of circumcision surgery, the wound will be split, which is considered to be caused by the infection of the wound of circumcision surgery or excessive pulling due to normal morning erection. During the recovery period after circumcision, poor hygiene and easy sweating can lead to infection at the surgical wound, and after infection, the wound is infiltrated by a large number of local inflammatory cells, which affects the healing process of tissue repair and leads to greater tension at the trauma site and a larger wound. Normal men will have physiological penile erection in the early morning during sleep, and the skin tension will become bigger during erection. Due to the 20 days after the operation, the wound has not completely healed, the ability to resist tension pulling is weak, and wound tearing occurs. It is recommended that the patient immediately go to the local hospital urology department, explain the situation to the doctor in detail, follow the doctor’s instructions to choose the appropriate antibiotics, such as cefixime, levofloxacin and topical potassium permanganate lotion to treat the infection, and to promote the recovery of the wound, and if the effect is not good the wound is further oversized, then you need to consider a second surgical suture. After 20 days after the circumcision surgery, wound dehiscence is larger, need to actively consult the doctor, under the guidance of the physician to deal with.