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Are multiple sessions of Botox injections needed for slimming the masseter muscle before results are noticeable?

GDennison
8 months ago I had 40 units of Botox injected into my masseter muscles (20 each side) in hopes to slim my square jawline. This was my first Botox injection and I didn't notice any results as all. I'm 19 years old and healthy. Is it possible that my muscles are fighting back and multiple sessions are needed before I see results? Or does this procedure not work on all patients?

Answers (19)

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