Procedure four weeks ago w/local. Two weeks ago out of nowhere the jaw on the left side became stiff. I cannot open my mouth to get a toothbrush in. If I try to pry it open, the pain is unbearable. No pain otherwise when talking. To more accurately describe, it seems like the masseter has shrunk and can't open any further. Any ideas what's going on? Hard to move my tongue from left to right when I stick it out. Has not improved in two weeks and I have been sedentary. Starting to worry.