Experts in Yixing, Changsha said: Excessive chewing of betel nut gum will lead to hypertrophy of masseter muscles, which will make the face wider and uglier, farther and farther away from the little face that both men and women are pursuing now, but some people are difficult to change in a short time because of their long-term habits, so face-lifting needle is the fastest and most effective choice to save the deformed big face. 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.