The Temporomandibular Joint (TMJ) is the hinge that connects your jaw to your skull. Since TMD (Temporomandibular Disorder) directly affects the functioning of the jaw, this is the first area where you are likely to experience pain or discomfort. TMD is an issue involving chronic neuromuscular dentistry. Pain may be constant or come and go over time, appear after periods of rest or activity, and can radiate out to other areas of the face causing eye, ear, sinus, or neck and back pain. Getting treatment right away can prevent the pain from spreading.