Are You Living With Jaw Dysfunction and Pain? TMJ Can Limit Your Life, But You Don’t Have To Let It. Do you have a hard time chewing or yawning? Do you feel pain in your jaw? When you open or close your mouth, do you hear a click? If so, you may have a TMJ, or “temporomandibular joint dysfunction.” The temporomandibular joint is the joint that connects your jaw to your skull. TMJ is a disorder that induces pain and stiffness in the jaw joint and its associated muscles. TMJ dysfunction may occur if the joint is injured in some ...