How long does Botox injection into the masseter muscle last?

Nov 05, 2021 Source: Cainiu Health
Disease description:

My face is simply large. I know it appears large due to enlarged masseter muscles. I’ve previously attempted weight loss, but my face hasn’t slimmed down. I’d like to ask: If I receive botulinum toxin injections (commonly known as “face-slimming injections”) targeting the masseter muscles, how long will the effects last?

Doctor's answer (1)
Dr. Liu Yong
Hello, Botox injections for facial slimming involve injecting botulinum toxin into the facial muscles. The slimming effect is relatively noticeable, with visible results typically appearing within about one week. However, this effect is not permanent; over time, the face will gradually return to its original appearance. Generally, Botox injections targeting the masseter muscles last approximately six months. Once the effect wears off, a follow-up injection is required to maintain the results. I hope this information is helpful to you. Wishing you good health!