Botox for TMJ-My jaw is very sore and at the injection site it is swollen?

Thank you for your question. Swelling after any injection could be inflammation or bruising and can cause soreness and should resolve within 1 to 2 weeks. If this worsens or you experience a fever and redness please follow up with your treating physician. Best of Luck!

While some bruising and swelling should be expected with any injection, I find this to be rare with masseter Botox injections. I would followup with your injector with any concerns. 

I am not sure what is going on but don't know why  you should have pain and swelling at his point. I would go see your doctor and have this checked. 

Thank you for your question.  I usuallt do advice my patients that the muscle feels sore after botox injections for a few days after.  10cc seems like quite a large amount of volume for a botox injection...I think you mean 10 units? I do not usually encounter swelling, but if large amounts of volume were injected, the swelling may be from that. 
Good thing is, all of your symptoms should go away pretty rapidly.
Best of luck!