TMJ Disorders comprise a variety of signs and symptoms in the head and neck associated with improper function of the temporomandibular joint (TM), head and neck muscles, nerves, and the occlusion (bite).
Sudden changes in occlusion are rarely related to the teeth. Most often the problem is in the TMJ or neck. Muscle pain, although present is very rarely the primary cause. It is typically secondary to an orthopedic problem in the head or neck.