Masseter Botox side effects?

A few days if at all is more common. Neither is having difficulty with mouth opening and chewing is not common. I would return to your treating physician for an evaluation.

Thank you for your question. You should not be experiencing muscle soreness at a month and a half after the treatment. Consider scheduling a follow up with your injector to discuss your concerns. Best,

Botox for the jawline shouldn't cause pain, I suggest you speak to your physician if you are concerned.  Best, Dr. Emer.

Botox for masseter should not make other jaw muscles sore. The masseter is not one of the jaw opening muscles and even if it gets tender, it should not affect mouth opening. You need to be tested for night grinding. I always do a home sleep test for patients to check for grinding and other sleep disorders that are closely related to each other. Injecting the masseter is only a temporary relief for grinding but is not a defenitive treatment. 

you should not be having soreness 6 weeks after the injection into the masseter. go back and see your physician and see what is going on

I would get re-evaluated to see what the issue is. It is possible you need more at this point. It is hard to say without seeing you in person. This is not a usual side effect of this injection.

Hello Jtanix,Botox to the masseter should not have left that muscle sore for 6 weeks.  There can be some initial discomfort but that should have worn off in a few days.  The masseter muscle helps to close the mouth, but even if it has been weakened it should not affect how wide you can open it.  It is possible that the other muscles that help to close the mouth have become more fatigued which is why they are sore, and moving a sore muscle can cause some discomfort.  I would recommend you follow up with your injector for an evaluation.  If you noticed you were no longer grinding your teeth and your face has slimmed, then with time the other muscles would likely get more used to the lack of help from the masseter muscle and improve these symptoms.  If you didn't notice any improvement for your goals with the Botox to the masseter, then you may consider not continuing with the treatment to avoid this soreness.I hope this helps and good luck.  

It is common to feel a little weak after Botox in the masseter but this goes in a week.  I have not encountered the pain and soreness you are experiencing.   Go and see you Botox physician.   My Best,  Dr Commons