If you experience some pain in your jaw, it could be TMJ, or temporomandibular joint disorder. This means that the hinge that connects the upper and lower jaw is not working properly. This hinge is also one of the most complex joints in your body, since it is responsible for moving the lower jaw forward, backward, and side-to-side. If there is a problem with any muscle, ligament, disc, or bone from working as it should be, this is know as TMJ. Typically, it will feel like you