If you have not seen a doctor, do so. Dentists are not MDs. They can help you fix or prevent damage caused by grinding but they are not qualified to diagnose or

If you have not seen a doctor, do so. Dentists are not MDs. They can help you fix or prevent damage caused by grinding but they are not qualified to diagnose or treat the cause despite what they may tell you. Also don't take medical advice from strangers on the Internet (or request it, because you just end up helping to generate more insidious noise that will show up in search results for decades).