Botulinum toxin injected into the muscle hypertrophy area makes the muscle relax and atrophy, and the masseter activity decreases and the atrophy becomes smaller, which depends on the effect of face-lifting needle, which only works on the muscles in the injection area, and can't lose face all over with one needle. After injection, it does not affect normal life, has no scar in appearance, and does not affect skin and normal muscle function. Compared with traditional surgical methods, it has more unique advantages. The effect can generally last for about 3-6 months. If you often chew sports (such as chewing gum, cracking melon seeds, etc.). ) are properly avoided and can be preserved for a longer period of time.