Sometimes, the pain originates from a cavity. Other times, it comes from trauma to the area affected. And even other times, it’s completely random or a fluke (which is typically the most annoying, considering you didn’t actually do or neglect anything to make it this way).
But jaw pain is a little different than the pain in your teeth. Tooth pain is particularly bad because the nerves are the ones affected, and so it can hurt severely, causing pain that needs to be treated immediately. The jaw, however, is typically only affected when it’s moving. So long as it’s resting, there’s not typically any soreness.
So possibly it’s from TMJ. Maybe it got hit or dislocated. And sometimes, it can just be sore from clenching too much or unknowingly clenching at night.
No matter the case, there are a few things you can do to relieve a tight or sore jaw.