Face slimming injection is usually recommended to be injected once in 4-6 months, and 3 consecutive injections can be maintained for a longer period of time. The main component of the face slimming injection is a botulinum toxin, the time cycle of metabolism in the body is generally 4-6 months, face slimming effect can be maintained for more than 6-8 months. But the specific maintenance time there are individual differences, mainly related to dietary habits and chewing habits. Clinically recommended face slimming injections are generally injected once every 4-6 months, and can be observed after 3 injections. In addition, it should be noted that the interval between injections should be no less than 2 months to avoid poor results or depressions below the outer cheekbone. After the face slimming injection, patients need to pay attention to the face as far as possible to avoid water, do not make up, not to drink. Usually try not to eat spicy, stimulating food, and do not eat too hard food to avoid excessive use of the bite muscle.