Temporomandibular arthritis is also known as temporomandibular joint disorder. Temporomandibular joint disorder is characterized by soreness and pain in the joints in front of the ear, inability to open the mouth when the joint movement is impaired, and a ringing sound when the joint movement occurs. The main area of pain is the temporomandibular joint area in front of the ear and around the joint, with varying degrees of pressure pain. The pain is more pronounced when chewing or opening the mouth. The joint rattles when the mouth is opened. The main motor impairment is limited mouth opening movement, and occasionally tinnitus and dizziness may occur. The causes of temporomandibular arthritis are: 1. Temporomandibular joint disorders caused by trauma. For example, the joint or mandible has been traumatized, acute trauma caused by gravity impact, biting too hard, opening the mouth too much, etc. These traumas cause joint damage and masticatory muscle group dysfunction, resulting in joint disorders. 2, excessive tooth wear, too many missing posterior molars, occlusal interference, etc., resulting in disruption of the occlusal relationship, disrupting the balance of the internal structure of the joint, leading to the occurrence of the disease. 3, the occurrence and aggravation of temporomandibular joint disorder syndrome is related to mental factors, if the mental tension and anxiety, often showing the action of clenching teeth, will cause joint disorders. 4, the influence of other diseases, rheumatoid arthritis may also cause temporomandibular joint disorder. The appearance of temporomandibular arthritis can be evaluated and treated at the temporomandibular joint specialist of the dental hospital, especially the progressive symptoms should be given sufficient attention to prevent serious structural damage and dysfunction.