Jaw angle hypertrophy can be understood from two aspects: 1, usually eat with special effort, is unilateral chewing or bilateral chewing, how much to eat; joint use less, will cause masticatory muscle hypertrophy, first consider whether the masticatory muscle will be hypertrophic. If the masticatory muscle is hypertrophic and causes the jaw angle to be enlarged, the masticatory muscle needs to be reduced, which can be thinned by surgery, or the volume of the masticatory muscle can be changed by injecting botulinum toxin. 2. If the jaw angle is bony and exostosis, the jaw angle can be trimmed by surgery very clearly. There is no limit to the amount of jaw angle that can be cut, but anatomical factors must be taken into consideration, and there is a limit to how much can be cut. In special cases where the jaw angle is also enlarged and the masticatory muscles are also enlarged, the two can be performed side by side and in addition to surgery, injections of the masticatory muscles can be done to achieve a more significant face slimming effect.