The big mouth can be improved by plastic surgery. To adjust the big mouth in plastic surgery, it is generally necessary to first determine the correct position of the mouth corner, and then cut it from the outer end of the mouth corner crack and the boundary edge between mucosa and skin. The incision passes through the skin and muscle layer, but not through the mucosa, so that it can be turned over as the oral mucosa when sewing. If you want to do this kind of operation, it is recommended to go to a regular hospital.