The temporomandibular joint (TMJ) is a hinge joint that connects your lower skull to your upper jaw. It is responsible for allowing jaw movement, which enables speaking, chewing, and swallowing. This complex joint is made of muscles, bones, ligaments, and cartilage. Despite its essential role in our daily activities, it can be a common source of pain and discomfort for many people for various reasons. One of the main causes of TMJ is caused by teeth grinding and clenching, medically known as bruxism.