Cryptorchid surgery is not a very big surgery, but there are some risks, although the probability of occurrence is relatively low 1. First of all, the anesthesia accident, which may cause respiratory and cardiac arrest in serious cases. The anesthesiologist will also talk about the anesthesia risk before the surgery. In fact, the likelihood of an anesthetic accident is very small, especially in large hospitals, hospitals with many surgeries, less than one in a thousand, but it is still possible to happen, pay attention to the following points: fasting before anesthesia is very important, fasting (including water) for 6-8 hours before the operation, so that the stomach is basically empty, it is not easy to vomit, accidental inhalation, the operation can not be in the case of coughing, runny nose, vomiting, diarrhea, fever, and so on, go to do the operation. The anesthesiologist will ask relevant questions before the anesthesia conversation and cannot hide them! 2. Damage to the surrounding tissues during surgery, such as damage to the spermatic cord blood vessels, vas deferens, etc., affecting sexual and reproductive function in adulthood; damage to the bladder, requiring bladder repair; damage to large blood vessels causing bleeding. Children’s tissues and blood vessels are relatively small, it is not easy to distinguish between them, and sometimes it is easy to be mistakenly injured. Of course, the possibility of accidental injury is still relatively small. 3.Testicle retraction after surgery, need to operate again. Due to scar contraction, high testicular position and high tension, any doctor doing cryptorchid surgery may have the possibility of retraction and re-operation. 4.It is found during the operation that the testicle can not be lowered to the scrotum at one time, and another operation is needed. If the tension of the testicle descending to the scrotum is too big, you can’t lower the testicle just for the sake of lowering the testicle, the tension is too big, which affects the blood supply, and lowering it is of little use. 5.Surgical incision infection, pus. We use cosmetic stitches, cosmetic suture, generally do not remove the stitches and do not change the medicine, but the incision is in the groin area, close to the anus and urethra exit of pooping and urinating, there may be redness and swelling of the incision, infection, pus, etc. Some babies are sensitive to stitches, and there may be a reaction to the stitches (baby’s constitution specificity), resulting in repeated infections of pus, Dr. Huang has seen a baby because of the reaction of the stitches 4 times infected with pus! Dr. Wong has seen a baby with 4 infections and pus due to thread reaction, but in the end, the incision still healed well. Overall, surgical incision infection is rare. 6. Scrotal edema and hematoma after surgery. Theoretically speaking, edema is more or less common, the higher the position of the testicle, the greater the edema, hematoma is also the same, the probability of hematoma is relatively low, with the high position of the testicle, more surgical operations, the baby cries a lot, postoperative strenuous activities, such as stopping the blood vessels and then open and so on. 7. Some babies may still have testicular failure or atrophy. Cryptorchid baby’s testicle itself has different degree of testicular dysplasia. After the operation, there are generally three kinds of prognosis for the baby’s testicles: 1) the testicles can develop, although the size of the testicles is a little bit different from that of normal babies, but the function is good; 2) the testicles are relatively small, but they have function, and they can produce normal sperms; 3) the testicles are small or atrophic, and they have no function. 8. The inguinal area is a weak area after the operation and may be complicated by hernia or syringomyelia. 9, Other unforeseen accidents that cannot be predicted before the operation. Each baby’s individual differences are great.