The face slimming needle is likely to rebound, because the main component of the slimming needle is botulinum toxin, botulinum toxin injected into the facial bite muscle, it can block the nerve to muscle nutrition, and make the bite muscle gradually atrophy, so as to achieve the effect of a thin face. But botulinum toxin injection into the facial bite muscle is a certain amount of limit, after the completion of injection, botulinum toxin in the bite muscle gradually spread, with the passage of time, botulinum toxin will be depleted, once depleted, its atrophy function on the bite muscle will gradually lose. And in the process of chewing food the bite muscle is constantly moving, its atrophy will slowly become less, and will eventually return to its previous appearance, but slightly smaller than before the face slimming injection. Therefore, if you want to continue to slim your face, you may need to inject the slimming injection again, after 2-3 injections, the effect of slimming your face will basically maintain a stable degree.