You can have a face slimming injection or a mandibular osteotomy. Any surgery may have risks and complications, our doctors will try to minimize the risks osteotomy: bleeding, hematoma, infection, asymmetry on both sides, injury to the mandibular rim branch of the facial nerve, injury to the inferior alveolar nerve, and fracture of the ascending branch of the mandible may occur. Preventive measures: careful preoperative examination, aseptic operation, pay attention to stripping the mandible under the periosteum to prevent damage to the mandibular rim branch of the facial nerve and facial artery. Pay attention to avoiding the inferior alveolar nerve during osteotomy, and pay attention to protecting the terminal branch of the inferior alveolar nerve – chin nerve when pulling the angle of the mouth. Pay attention to the angle, direction and amount of osteotomy, and pay attention to the symmetry of both sides to prevent fracture. Postoperative drainage, pressure bandaging, and keeping the mouth clean. The time of osteotomy surgery must avoid menstruation, and the pressure dressing must be applied for 2-3 days after surgery to prevent bleeding and hematoma. After removal of the pressure dressing, insist on wearing an elastic headgear to reduce facial edema and try to keep the head in a high position to promote swelling and recovery. Avoid strenuous exercise and collision for two weeks after surgery. l Osteotomy is operated under general anesthesia and requires intravenous rehydration after surgery. l A liquid diet is required for 7 days. The first three days must be a completely liquid diet. Such as boiled water, fruit juice, noodle soup, rice soup, chicken soup, fish soup, etc. (1 or 2 days after surgery, we should pay attention to drink less milk, which may easily cause abdominal distension and vomiting). In the next few days, you can gradually eat a semi-liquid diet such as thin porridge and batter. In the postoperative period, special mouthwash will be provided to ensure that the mouth is rinsed three times a day, and the mouth must be rinsed once immediately after eating to keep the mouth clean and prevent infection caused by food residue retention. The bandage should not be removed or moved at will after the surgery. If the bandage is not in the right position, it will make your face swell up more and your recovery will be slower. When washing your face, be careful not to scrub hard, but to dip and wash like a dragonfly.