What could be causing persisting jaw pain after Botox for TMJ?

Probably not a serious problem. Most commonly, its a small bruise that will resolve in a week or so. I have not seen anything more serious than this as a cause, but contact your office when they open.

This may be due to surrounding muscles overworking after your Botox treatment and needs an in-person evaluation. I recommend following up with your injector. Botox results resolve in 3-4 months. Best, Dr. Emer

Thanks for asking the question.
If the pain occured within few days after the injection it could be from bruising. You should follow up with your physician to have a proper examination to make sure there are no signs of infection. 
Take care.
Dr. Uzma Quraishi
Board certified Internist
Brandywine Medspa
Kennett Square, PA

It is not typical for there to be pain two weeks later from a Botox injection. I’m wondering if you’ve developed an infection at the injection site, or a coincidental abscess in the inside in the same region of the injection.See your provider ASAP to have it looked at.Best. Dr Brecht Seattle, Wa