Face slimming injections, i.e. Botulinum toxin type A injections, act primarily on muscle tissue and are known as face slimming injections because they are commonly used to address enlarged bite muscles. The professional name of face slimming injection is Botulinum toxin, a biological product that can be mass produced by genetic engineering. Because it has a nerve blocking effect, it is very commonly used in neurology, ophthalmology, plastic and cosmetic surgery. Face slimming is essentially the use of botulinum toxin injections to treat enlarged bite muscles. Women with oval-shaped faces are beautiful and often require plastic surgery due to hypertrophy at the jaw angle. More than 90% of these patients are accompanied by benign bite hypertrophy and wish to reduce it at the same time. In 1994, Smyth et al. reported the experience of using botulinum toxin type A to treat bilateral hypertrophy of the bite muscle, which was considered a revolutionary new method. Botulinum toxin injections shrink and reduce the size of the bite muscle through a denervation effect, making the treatment more complete. The principle of face slimming injection is to block the nerve impulses between nerves and muscles, to relax the over-contracted muscles, and to paralyze the over-developed muscles, which uses paralysis to achieve the purpose of “dysfunctional atrophy”, so that the original hypertrophic muscles can be reduced in size to achieve a smaller face. The effect of facial slimming injections appears slowly, about two weeks to a month after the injection. The effect can generally be maintained for about 5-10 months. It can also last longer if frequent chewing movements (such as chewing gum, knocking melon seeds, etc.) are properly avoided. Indications According to the reasons for the large face there are three, because the corresponding thinning of the face also has three methods, as follows: 1, facial bone development is wide, this kind of thin face to be achieved through the method of bone cutting. 2, facial bite muscle developed hypertrophy, this kind of thin face is to remove the bite muscle or injection of thin face needle to make the bite muscle thinning method to achieve. 3, facial fat accumulation, this kind of thin face need to use the method of facial liposuction shaping to achieve. So for big face symptoms, face slimming injection is not a panacea. The face slimming injection can only be aimed at the second original country “face”, that is, the face of the word, bite muscle hypertrophy, rather than simply jawbone hypertrophy. The first thing you need to do is to get a good idea of what you’re looking for. The surgery is performed in the mouth, and firstly, the bacteria in the mouth should be thoroughly disinfected to reduce the rate of post-operative infection. The medial aspect of the bite muscle should be removed to avoid injury to the mandibular border branch of the facial nerve. The amount of bite muscle removal depends on the preoperative examination, the amount of removal generally does not exceed one-third of the thickness of the bite muscle. Face slimming injections are generally chosen from 1 to 2 injection sites per side, the injection process takes about 20 minutes, without anesthesia, with little injection trauma and fast recovery. After 2 to 3 weeks after the injection, the bite muscle began to shrink and the effect of face slimming appeared. The effect can last about a year, and then gradually recovered, after several injections of muscle atrophy to set.