The tooth at the top on the left side has been hurting for a while now. It's been causing headaches, ear aches & not a sharp pain but just a nagging pain. Sometimes I have sharp pains in my head & sometimes when I talk or chew my jaw gets tired. No signs of swelling just pain. I also grind my teeth at night, does this have anything to do with what im going through. Could this be more than one problem or just a bad tooth? Could my jaws lock up because of some of these problems. Could this be a sign of TMJ?