Upper and lower jaw correction/protruding mouth correction surgery involves cutting the back of the jaw bone, overlapping it, and then fixing it so that the entire jaw that is protruding is retracted backwards, roughly divided into sagittal splitting and vertical osteotomy. There are certain risks associated with this surgery, as follows: 1. Asymmetry between the left and right sides after surgery: Since it is impossible for the surgeon performing this surgery to calculate the size of the bone to be removed precisely, it is difficult to perform the surgery, and this phenomenon may also occur during the surgery due to the asymmetry of one’s own facial contour and the surgeon’s negligence; 2. Some nerves grow close to the periosteum, once the surgeon is not careful during the surgery, it will lead to the separation of the nerve and periosteum, which will hurt the perceptual nerve and cause numbness. If the facial nerve is injured, it will lead to abnormal facial muscle movement; 3. Hematoma after surgery: The main reason for this phenomenon is that the surgeon placed the drainage tube incorrectly, resulting in a large amount of bruising on the face; 4. Local infection: Once infected, it often does not heal for a long time; 5. Poor bone healing: It is often caused by improper surgical operation or improper post-operative care. After upper and lower jaw surgery, patients are required to stay in the hospital for 3-5 days for observation, and the cephalic mask should be wrapped with pressure for 5-7 days, and should not be unwrapped in the middle if there are no special circumstances, and should be wrapped in time if unwrapped, paying attention to check whether there is any pressure on the skin. If a drainage strip is placed in the intraoral wound, it should be removed 48 hours after surgery. In addition, do not wash your hair within 1 week, which is not conducive to the recovery of the incision.