Mandibular arthritis, also called temporomandibular arthritis, is a chronic injury to the temporomandibular joint caused by a variety of causes, resulting in temporomandibular joint dysfunction, and its main clinical manifestations are as follows. The most obvious symptom is pain, mainly localized in the temporomandibular joint, which can sometimes involve the head and face and even cause headache, dizziness or even migraine, and in severe cases, it can radiate to the neck and shoulders, especially when talking or eating, and sometimes it can cause tinnitus or hearing loss. A common symptom is joint popping, which means that the temporomandibular joint pops when opening the mouth or yawning or eating. A common symptom is abnormal jaw movement, which can lead to small mouth opening or even inability to open the mouth, and in severe cases, joint locking can occur during mouth opening and affect eating. Some patients may also experience swelling of the affected side of the face. For example, in addition to pain in the jaw joint, rheumatoid arthritis can also cause pain and swelling in other small joints of the body. For mandibular arthritis, a thorough examination should be done by a dentist at a hospital to clarify the cause of the disease before making targeted treatment.