The methods to make the jawbone wider and smaller include face slimming injection, bone grinding and osteotomy. 1. Face slimming injection: Due to the habit of teeth grinding and sideways chewing while sleeping, the mandible becomes wide, local injection of face slimming injection can make the local muscles wasted atrophy, and repeated injections can make the mandible smaller. 2. Osteotomy: If the width of the mandible is not particularly obvious, it can be properly adjusted through osteotomy by grinding off part of the jawbone to make the mandible smaller, so as to obtain a satisfactory facial shape. 3. Osteotomy: If the jawbone is very wide, osteotomy may be needed. Osteotomy is the surgical removal of part of the bone. Osteotomy causes more damage to the bone and removes a larger portion of it than bone grinding. Both of these surgical treatments are invasive and carry a high risk, so you should choose your surgery carefully. If you need treatment, please go to a regular hospital in time and choose the appropriate treatment plan under the guidance of the doctor to avoid adverse consequences.