The principle of the action of the face slimming injection is to let the botulinum toxin injection into the bite muscle, blocking the neuromuscular conduction, to achieve the purpose of preventing muscle movement, so that the original hypertrophy of the muscle atrophy, the bite muscle contraction is inhibited will appear disuse atrophy. In general, the botulinum toxin injection 7 days after the full force of the inhibition of the movement of the bite muscle, the atrophy of the bite muscle is a gradual process, generally about 3 months will achieve the best effect of thinning the face. The maintenance time of the treatment effect varies from person to person, generally speaking, after 6 months, you need to inject again to maintain the effect. If you want to achieve long-lasting results, injections every 6 months are usually recommended. If multiple consecutive injections of facial slimming injection 5 years but has not recovered, generally because the effect of facial slimming injection is still retained, after the effect of the slimming injection disappears can slowly restore the original appearance, the specific situation varies from person to person, the prerequisite is to ensure that the injection of drugs is real and effective only. Post-operative precautions include the following: 1, after playing the thinning needle face a little sour and soft, a normal reaction, do not choose ice or hot compress in order to quickly eliminate discomfort; 2, after playing the thinning needle, avoid eating hard shell food, tough food, try to reduce the movement of the face bite muscle, otherwise the effect of the thinning needle will be halved; 3, avoid the use of aminoglycoside antibiotics.