TMJ disorder is an acronym used to abbreviate temporomandibular joint disorder. This disorder impacts the jaw joint as well as the muscles responsible for controlling the jaw. TMJ oftentimes results in pain toward the front portion of the ears. In some cases, TMJ disorder leads to pain in the form of a headache. TMJ pain can result from trauma, degenerative/inflammatory arthritis, shoddy dental work, and other stimuli. In some cases, structural defects move the mandible back in the direction of the ears when swallowing or chewing. Those who clench or grind their teeth as a result of stress often suffer from TMJ pain. It is even possible for the muscles positioned by the TMJ that facilitate the chewing process to spasm, leading to mouth, neck and head pain.