Temporomandibular joint disorder syndrome occurs mostly in young adults. Its pathogenesis is not fully understood. The main features of the syndrome are painful and sore joint areas, popping during movement, and impaired mouth movement. Most of them are joint dysfunction and have a good prognosis; however, in rare cases, organic changes may occur. The temporomandibular joint is closely related to the masticatory muscles, ligaments, jawbone and teeth occlusion, and they coordinate with each other in order to exercise normal physiological functions. If dysfunction or structural changes occur, temporomandibular joint disorder syndrome can occur. The common related factors are as follows: 1. Trauma factors Many patients have a history of local trauma. For example, acute trauma such as external impact, sudden biting of hard objects, excessive mouth opening (e.g. yawning), frequent chewing of hard food, night grinding and unilateral chewing habits. These factors may cause joint contusion or strain, masticatory muscle group dysfunction also has a certain impact on the occurrence of this disease. 2, occlusal factors many patients have obvious occlusal relationship disorder. For example, the tip of the teeth is too high, the teeth are excessively worn, too many missing molar teeth, bad dentures, and the intermaxillary distance is too low. Disturbance of the occlusal relationship can disrupt the balance of function between the internal structures of the joint and contribute to the occurrence of the disease. 3, systemic and other factors neuropsychiatric factors and the disease can have a certain relationship. For example, some patients are emotionally anxious, nervous and easily agitated. In addition, some patients have a history of rheumatism, and the onset of some is related to cold. The main clinical manifestations of TMJ disorder syndrome include localized soreness or pain, popping and movement disorders. The pain may be in the joint area or around the joint; it may be accompanied by mild or severe pressure pain. The soreness or pain in the joint is especially pronounced when chewing and opening the mouth. The popping occurs during mouth opening activities. The ringing can occur at different stages of jaw movement, and can be a single crisp ringing sound or a broken continuous ringing sound. The common obstruction to movement is restricted mouth opening, but over-opening or jaw deviation during mouth opening may also occur. In addition, it can be accompanied by temporal pain, dizziness, tinnitus and other symptoms The specific treatment measures are: 1, correction of the occlusal relationship by the dental specialist examination and treatment; 2, closure therapy available 0, 25-0, 5% procaine 3 ~ 5ml for extra-pterygoid muscle closure. Puncture point in the midpoint of the sigmoid notch, vertical needle, depth of about 2, 5 ~ 3cm, back to draw no blood when injecting drugs. It is often used for patients with over-open mouth; 3. Chloroethane spray with massage can relieve masticatory muscle spasm. When spraying chloroethane into a mist, intermittent spray, with massage to prevent frostbite. And pay attention to the protection of the eyes and ears, away from the source of fire; 4, acupuncture therapy points: Shimonoseki, hearing Palace, cheek car, Hegu, with medical wind, Sun; 5, ultra-short wave, ion introduction, electrical excitation and magnetic therapy and other local physiotherapy has a certain effect. Treatment should be accompanied by correction of bad habits (such as unilateral chewing) and prevention of over-open mouth, etc.