Temporomandibular joint (TMJ) disorders can be caused by a combination of factors, and the exact cause of a person's TMJ disorder is often difficult to determine. Some possible causes include genetics, arthritis, jaw injury, long- term grinding or clenching of teeth, and certain connective tissue diseases that affect the temporomandibular joint
. Other factors such as stress, movement of the soft cushion or disc between the ball and socket of the joint, and arthritis in the joint can also contribute to TMJ disorders
