My son is five and on and off he goes through eprisodes, sometimes weeks at a time where he chomps his teeth together. It almost seems uncontrollable, he will be doing a project, watching a movie or even just waking up and he will start doing it over and over. I asked his pediatrician what he thought was going on and he said it is just a tick. Some kids have more elaborate ones than others (kind of when dealing with stress or change). I don't make a big deal about it in front of him but I worry because it is so continuous sometimes, I don't want to overlook if something is going on. Any ideas if it is just a tick, or a real problem.