Botox injection can make part of the bite muscle atrophy, to achieve the effect of slimming the face, for the square face due to simple bite muscle hypertrophy, is a recommended method of slimming the face. The effect of face slimming injection is not permanent, one effect can generally be maintained for 6-8 months, if you want to maintain for a long time, you can choose multiple injections. Doctors often recommend an interval of 4-6 months after an injection, which is more in line with the process of drug metabolism after a single injection. If a high frequency of injections, it is possible that the effect is the same as the later regular injections, it is generally not recommended that the interval is short, high frequency to inject, but more recommended during the treatment period of regular, appropriate amount of medication. Candidates need to note that after the injection of facial slimming injection can be iced to reduce swelling and bruising; can not be vigorously massaged, hot compresses and rubbing to prevent the dispersion of botulinum toxin; 8 hours later can be dipped in water; 1-2 weeks will have a mild bite weakness, need to try to avoid eating nuts or harder food. In addition, it is recommended that candidates go to a regular hospital and choose a physician with a license to operate, to avoid adverse effects on the face and aesthetics due to problems with drugs and doctor’s operation.