There are two most common symptoms of failed cryptorchid surgery: 1. Testicular retraction, that is, after surgery, due to high tension and excessive activity of the spermatic cord, the testicle fixed in the scrotum is retracted to the inguinal region, at which time the examination will reveal that the testicle in the scrotum disappears and the testicle cannot be felt. Ultrasound and CT examination were performed and the testicle was still located in the inguinal region, suggesting that the surgery failed. It is recommended to perform the descending fixation surgery again, and fully free the spermatic cord around and reduce the tension to ensure that the testicle will not retract. 2. Acute pain in the scrotum and increased wound ooze after testicular surgery suggest the possibility of ischemic necrosis of the testicle. During the operation, it is possible that the spermatic cord may be free, resulting in excessive vascular damage, testicular ischemia and acute necrosis, or the spermatic cord may be twisted during the descent of the testicle after freeing the spermatic cord, resulting in acute ischemia of the testicle, pain and increased oozing, so it is recommended to reset or surgically remove the testicle immediately.