One of the main reasons for jaw pain is TMD, which can be caused by teeth grinding. A sinus infection and dental issues like cavities may also lead to jaw pain. In rare cases, jaw pain may be a sign ...

The trigeminal nerve is a cranial nerve. It arises from the brainstem, and its branches cover your face and head. The trigeminal nerve is a paired nerve — you have one on each side. Its chief function ...