Temporomandibular joint disorders include joint disorders, joint dislocations, joint ankylosis, joint fractures, and joint tumors. Among them, temporomandibular joint disorders are the most common. The manifestations of TMJ disorders include local pain, joint popping and movement disorders. The pain can be in the joint area or around the joint, and the joint is sore or painful especially when chewing and opening the mouth. The popping sound occurs during joint movement and can occur at different stages of jaw movement, either as a single crisp sound or as a continuous rubbing sound. The movement disorder is mainly restricted opening of the mouth, but over-opening of the mouth or deflection of the jaw during opening of the mouth may also occur. Or the mouth may be difficult to close after opening. In addition, it may be accompanied by temporal pain, dizziness, tinnitus and other symptoms. The causes of TMJ disorders are multifactorial, and these contributing factors include: 1. Trauma Factors History of local trauma such as acute trauma from external impact, sudden biting of hard objects, over-opening of the mouth (such as yawning), etc.; as well as the love of eating hard objects, night grinding and unilateral chewing habits. These factors may cause acute or chronic injury to the joint. 2, occlusal factors occlusal relationship disorders such as too high cusps, excessive wear of teeth, too many missing molars, bad dentures, intermaxillary distance is too low, etc.. Disorders of the occlusal relationship can disrupt the balance of joints and teeth, muscles and other structures, and contribute to the occurrence of joint diseases. 3. Systemic and psychosomatic factors Emotional stress, mental tension or mental depression can also cause endocrine and joint muscle function disorders, which are related to this disease. Treatment of temporomandibular joint disorder The first treatment method is self-protection and conditioning: avoid hard food; avoid trauma; avoid staying up late. Do more opening training; local hot and wet compresses; adjust the psychological state and master relaxation skills. Clinical treatment is mainly conservative:including physiotherapy, hot compresses and bite plates, etc., supplemented by medication according to the condition, NSAIDs such as anti-inflammatory pain, Fotarine, Fenbid, etc. This is then followed by irreversible conservative treatments such as adjustment and orthodontic treatment. Local treatment includes joint cavity irrigation treatment, joint cavity drug injection, etc. Finally, endoscopic surgery, open joint surgery, etc. are used when necessary.