Face slimming injection, that is, Botulinum toxin type A injection, the primary action on muscle tissue, because commonly used to solve the problem of bite muscle hypertrophy, to achieve a slimming effect, it is also known as the slimming needle. The main component of the face slimming injection is actually BotulinumToxin, a biological product that can be mass produced by genetic engineering methods. Because it has a nerve blocking effect, it is very commonly used in neurology, ophthalmology, plastic and cosmetic surgery. Face slimming injection is essentially the use of botulinum toxin injections to treat enlarged bite muscles. It was found that: due to the difficulty in grasping the amount of muscle excision and the depth of muscle excision in jaw angle surgery, not only is the result unsatisfactory, but it also tends to increase the chance of bleeding, hematoma and infection, resulting in serious complications such as asymmetry on both sides of the face, dental closure and longer-term muscle spasm. In 1994, Smyth et al. reported the experience of using botulinum toxin type A to treat bilateral bite hypertrophy, which was considered as a revolutionary new method. Botulinum toxin injections shrink and reduce the size of the bite muscle through denervation, allowing for more complete treatment. The principle of face slimming BOTOX slimming injection acts on the endings of cholinergic motor nerves, antagonizing the action of calcium ions in a way that interferes with the release of acetylcholine from motor nerve endings and prevents muscle fibers from contracting. The muscles that have not been exercised for a long time will gradually become thinner and weaker, the principle of “using in and out”. It is the use of this role of Botox, non-surgical medical cosmetic physicians will be used to inject the bite muscle to thin the face, to solve the bite muscle hypertrophy caused by the lower face too wide. Botulinum toxin face slimming mainly targets the enlarged lower jaw area caused by bite muscle hypertrophy, and cannot be targeted for bony causes of the problem. The best effect of the injection is usually presented in about 1 month. Botox face slimming injection does not require an incision or medication, only a small needle to inject the right amount of biological agents into the chewing muscle, and the purpose of slimming the face can be achieved in a very short period of time. The advantages of face slimming injections advantage one: no incision, no trauma, no traces, no pain, the injection only takes about 10 minutes, and with the age of doing away without bed rest. Advantage two: fast results, generally a week after the thinning effect can be seen, in 2-3 months when the effect reached the best, according to different personal constitution effect can be maintained for 6-12 months. After slimming the face curve soft, natural effect, beautiful and quietly not easily noticed by the surrounding people. Advantage three: in terms of dose and operation process requires precision, caution, compared to the slimming surgery, the price is lower and more economical. Advantage four: the use of the State Food and Drug Administration (SFDA) approved the use of botulinum toxin (BOTOX), the use of dose is only one percent of the maximum safe dose, and through neurology, ophthalmology, plastic surgery, cosmetic surgery for many years of clinical verification, a higher safety factor. Advantage five: no massage after the face slimming injection (and not massage!) The special care is not required, and will not affect normal work and life in any way.