I wouldn't do it. It's botulism. In healthy people it can work wonders. In people with compromised immune systems it could be a disaster. I'd look into a chiropracter who knows how to release the muscle inside your mouth. You could also look into dry needling or muscle release with needles filled with just a small amount of lidocane. The purpose is the same. The needle releases the tension in the muscle.
/www.youtube.com/watch?v=CWwQBTly8ik That's just one video. There are a lot more on the side. Remember if this has been building up for months it's going to take time to release. You'll need to ice after anything you do to reduce swelling.