When I see this topic, I am like wtf; my left jaw is also
hurting since a few days ago, and I didn't even realize when and
why it started. And it's really getting on my nerves that I can't
yawn without stopping to do so abruptly a moment later because it
gets fucking painful when you try to open the injured jaw.
Anyway, fyi, this condition is known as trismus and there are
many causes to it, ranging from mild to severe cases. Just take
note that it is well-known for being one of the symptoms of tetanus
(the common name for "tetanus" is "lockjaw"), so if you begin
displaying other symptoms related to tetanus, you would really need
to visit a doctor as soon as possible.
http://en.wikipedia.org/wiki/Trismus
http://en.wikipedia.org/wiki/Tetanus
