The maintenance time of face slimming injection is mainly related to the patient’s physical characteristics, eating habits and chewing characteristics, etc. The general maintenance time is about 4-6 months, the specific time varies from person to person. The face slimming injection is mainly through the injection of botulinum toxin in the face, so that the bite muscle disuse atrophy, belongs to a nerve blocking agent. The metabolic cycle of botulinum toxin in the body is about 4-6 months, so the maintenance effect of the face slimming injection is 4-6 months. But if you like to eat hard things, and love to eat chewing gum and other snacks that require long chewing, the bite muscle will be overused, thus offsetting the effect of botulinum toxin, so that the face slimming injection maintenance time correspondingly shorter. Therefore, after the face slimming injection, patients need to pay attention to improve their eating habits and chewing habits, eat less spicy, stimulating food, avoid eating nuts and other hard things.