I recently had a filling replaced on my left jaw. The medication to numb that side caused me to bite the inside of that cheek. Afterwards, I experienced some tightness when chewing and dd some exerises to keep the jaw loosened up. I think I might have torn or stretched it too much. Right now I can only open my mouth with about a half inch opening. As the muscle heals, will I be able to open it further and what kind of time frame for complete healing am I looking at? Do I need to keep moving my jaw a bit to keep it from freezing shut? I've already been dealing with this for two weeks. Would a swelled up cheek cause the muscles to be tighter? My swelling gradually going down and I only notice the tightness when chewing. The cheek was bruised also, but is fading out.