Pre- and post-operative precautions for lingual ligamentoplasty: I. Pre-operative precautions 1. Routine blood tests and coagulation series before surgery, such as children with colds and coughs should be suspended. 2, breakfast on the day of surgery eat a small amount of liquid, such as milk about 100ml, so as to avoid the child crying caused by vomiting caused by accidental aspiration. 3.If the child has drug allergy or other diseases, especially congenital heart disease. You should take the initiative to inform the doctor. 2. Postoperative precautions 1. Leave the hospital without bleeding from the mouth after surgery. 2.Fluid or semi-fluid diet, keep the oral cavity clean and hygienic. 3.Stitches will be removed 1 week after surgery, and some children’s sutures will fall off by themselves.