Jaw plastic surgery will also have trauma, complications and scars, which will have a series of physical and psychological effects on plastic surgery. Cosmetic surgery is not a panacea. Don't expect too much from cosmetic surgery. When mandibular angle plastic osteotomy or bone grinding, subjects will not feel pain, because the bone itself has no nerves. However, after mandibular angle surgery, patients will feel pain, which is caused by soft tissue around the bone, but it will not be too intense. Usually you need to stay in hospital for 2-3 days after surgery. When grinding jaws, there may be asymmetry on both sides, resulting in hematoma, which will subside on its own according to personal physique.