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The jaw is a hinge joint connecting the mandible (jaw bone to the skull and it is surrounded by several pairs of muscles in front of the ear on each side of the head. There is a disc that separates the jaw from the skull. When the disc becomes misplaced it will cause temporal mandiblar joint dysfunction (TMJ).

The onset of pain may be immediate from a trauma or gradual mainly due to stress. Stress can lead to unconscious jaw clenching particularly during sleep which can lead to muscle spasming in the jaw area and prevent functioning of the TMJ.

This condition responds favorably to activator technique, cold laser and ultrasound.