I have a problem with my jaw I ve never had before. When I open it as far as I need, say, to put a fork in my mouth to eat, it clicks, just between the edge of my mouth and ear . It sounds a bit like an elastic band breaking. It only started today about halfway done my lunch. When I went to Guidance (I was at school), the lady I talked to said I should tell my mom to get it checked. What exactly is it? I am only 14 years old, turned so on January the 2nd. I have only had cavities once. I got 8 at the same time, but they were all baby teeth and I ve lost them by now. I ve never done anything to my jaw that I know of directly. My last visit to the dentist was in March(this month). I got my teeth cleaned and checked, as well as a flouride treatment. I also am known to grind my teeth at night, and used to have headgear. My orthodontist decided my condition was not too bad so I didn t get braces.