Cosmetic injection is a very popular cosmetic method which is concerned by more and more beautiful women. Among them, many friends through the injection of botulinum toxin for face slimming, but the common sense of botulinum toxin face slimming is not a very good understanding, so here to do a simple introduction. First, the principle of botulinum toxin face slimming Botulinum toxin is to block the nerve impulse transmission between the nerve and the muscle, so that the overdeveloped biting muscle paralysis, contraction, volume reduction to play the role of face slimming. Generally speaking, the gradual slimming of the face can be observed in about one week after injection of botulinum toxin. After two or three months, the effect of face slimming reaches its peak, and the biting muscle can be reduced by about 30%, and the effect can last for about half a year. Second, the method of botulinum toxin face slimming Want to achieve obvious face slimming effect, need to be based on the anatomical basis of biting muscle point injection, coordinated tightening of unreasonable part of the muscle tissue, so that the lower jaw to realize the slender bone curve. Generally speaking, each side of the face of the biting muscle to choose 2 injection points for injection, one side of the dose of 50 units, the injection should be quickly stabbed into the biting muscle, the patient will be asked to tighten the teeth, can feel the muscles, as slow as possible, generally speaking, there will only be a feeling of up and down, there will be no obvious pain. However, clinically, many candidates on both sides of the biting muscle is not symmetrical, this situation requires experienced doctors to target the dose of plus or minus, in order to achieve the effect of symmetry on both sides of the face after slimming. Third, after botulinum toxin injection precautions After injection, there will be chewing weakness in the early days, soreness and other phenomena, are normal phenomena; 6 hours after the injection without local massage and other special treatment, generally normal chewing movement can make the liquid in the muscle tissue gradually diffusion; one week after the injection of prohibited cigarettes and alcohol, spicy, deep-fried and other stimulating food; do not have to take aminoglycoside antibiotics; avoid eating hard food, and try not to eat too much after the injection. Hard food, try not to stimulate the biting muscle too much, otherwise the maintenance time of face slimming will be reduced. For people with large biting muscles, after injecting Botox for face slimming for about 3-6 months, it is necessary to inject again to maintain the effect.