what do you mean you don't know what a philtrum is?

TMJ Temporomandibular Joint or TMD Temporomandibular disorders, can cause headaches, earaches, tenderness of the jaw muscles, or dull, aching facial pain.
While you sleep, sometimes you clench or grind your teeth. A special appliance called a bite splint can be made which will allow the TMD to improve and prevent additional wear and tear on the joint.