Face-lifting needle, that is, botulinum toxin A injection, mainly acts on muscle tissue and is called face-lifting needle because it is often used to solve masseter hypertrophy. The professional name of face-lifting needle is botulinum toxin, which is a biological product and can be produced on a large scale through genetic engineering. Because of its nerve blocking effect, it is very commonly used in neurology, ophthalmology, plastic surgery and cosmetic surgery.

The essence of face-lifting needle face-lifting is to treat masseter hypertrophy with botulinum toxin injection. It is found that it is difficult to grasp the amount and depth of muscle resection in mandibular angle surgery, which not only leads to unsatisfactory results, but also increases the chances of bleeding, hematoma and infection, leading to serious complications such as asymmetry on both sides of the face, clenched teeth and long-term muscle spasm. 1994, Smyth et al reported the experience of treating bilateral masseter hypertrophy with botulinum toxin A, which was considered as a revolutionary new method. Botulinum toxin injection can reduce occlusal atrophy by denervation and make the treatment more thorough.

The effect of face-lifting needle is not 100%. After several injections, a few people will produce antibodies to botulinum toxin, making future injections ineffective. Because of chewing habits, there will still be slight asymmetry on both sides after injection. A few people may not be sensitive to drugs, so the effect is not obvious, and they need to return to the clinic after 2 weeks. Botulinum toxin can be recovered after injection, that is to say, after 3 to 6 months, it needs to be injected again to maintain the effect.