You should be talking about Illion. Iliac bone grafting is a common operation in orthopedic surgery, and postoperative pain is inevitable. It still hurts three months after operation, so don't be nervous. Bone grafting is actually an artificial bone defect, which can be classified as a part of fracture, and its recovery takes at least three months. The feeling of acid, numbness, swelling and pain may last for half a year to a year, even because the wound nerves grow in clusters and the pain lasts for life, but it does not. At present, we can find some traditional Chinese medicines for external application and ironing, which can promote their recovery and reduce pain.