There is a bag at the wound after tibial bone grafting surgery, which may be due to fracture displacement, local tissue proliferation, infection and so on. 1. Displaced fracture: after tibial implant surgery, there may be poor fixation of the surgical site, resulting in fracture and displacement, the prominent fracture end will be manifested as a bag in the skin, which usually has obvious pain, and bone rubbing sound and bone rubbing sensation can be heard. 2. Local hyperplasia: after bone grafting surgery, there will be granulation tissue hyperplasia at the end of the incision of the soft tissue at the surgical site, forming a “bag”, which is generally no need to worry about, and this bulge will gradually subside after the differentiation of the granulation tissue hyperplasia, and it will not have any serious effect. 3. Infection: If the wound is infected after bone grafting surgery, exudate may appear in the infected area, forming a bulge, accompanied by local swelling and pain. There are other reasons that can cause a bag at the wound after tibial bone grafting surgery. If you have any uncomfortable symptoms, it is recommended that you go to the hospital in time, complete the relevant examinations, clarify the cause of the disease and then follow the doctor’s instructions to carry out targeted treatment, so as to avoid delaying the condition.