If circumcision fails, it is recommended to go to the hospital for further examination to assess the cause of the failure, whether it is not enough excision length, or late scarring causing stenosis or formation of adhesions, etc. If the excision length is not enough and there is still a long foreskin left, a second surgical excision can be considered. Before excision, the length of the foreskin should be measured in a non-erect state and a marker line should be made, and then the excess foreskin can be removed along the marker line under anesthesia. If local scar formation causes stenosis after surgery, scar removal and stenosis enlargement surgery will be considered. If local adhesions exist, adhesion separation and release surgery can be performed under local anesthesia to achieve the desired result. It is specifically necessary to choose the appropriate plan according to the cause of failure, to evaluate in detail with the attending surgeon, and to perform a detailed setting of the surgical plan to avoid further failure.