Will my jaw muscles go back to normal if I stop chewing gum?

Yes, these will most likely get smaller if you use them less/stop chewing gum. Botox can also help reduce the masseter. Hope this helps.

It's hard to say, but this may give some improvement. Botox and radiofrequency treatments can slim the masseter. It takes 1-2 weeks for final results with Botox. Best, Dr. Emer

Thanks
for the question. I'm not aware of any actual scientific studies that answer
your question definitively. However, from my overall education and experience,
it is very likely that your muscles will become less bulky if you do not
routinely work them out aggressively ("aggressively chewing hard
gum"). Botox would generally work the same way i.e. reduce the ability to
chew aggressively and, therefore, allow the muscle to get smaller. I would
recommend a 3-6 months trial of behavior modification prior to trying a
medication (Botox).