Are you stressed?

If so, one way your body shows stress is by grinding your teeth at night. I had this pretty bad in middle school. In fact, it was so bad, I shredded my nightguard at one point, which left my mouth pretty cut up as a result. NOT fun. Today, they have softer, rubbery nightguards for this though, which is way better than what mine was back in the day when they were still a hard plastic. If you think you have a problem with this and may need to be checked out for a Night Guard, TMJ, Bruxism, Tooth Grinding, NightGuard, be sure to check with your dental professional. Anything is better than having your jaw locked in one place and in pain. Stress sucks, and it's so weird how our bodies all react to it differently.