TMJ disorders often bring pain in the joint and the surrounding muscles during movement. The cause of this disorder can be due to many factors, including genetics, arthritis or jaw injury, but for many it can be directly exacerbated by repetitive, excessive clenching or grinding. Symptoms may include frequent headaches that can be mild to severe, pain or tenderness in the jaw and/or temporomandibular joints, difficulty or pain while chewing, and locking of the temporomandibular joint, making it difficult to open or close your mouth. Other associated issues include ringing in ears, ear pain and enlarged masseter muscles.