Temporo-mandibularJointDysfunctionSyndrome (TMJDS) is one of the common disorders of the oral and maxillofacial region. Among temporomandibular joint disorders, this disease is the most common. It occurs in young adults, with the highest prevalence in the 20s and 30s. Temporomandibular joint disorder syndrome occurs mostly in young adults. Its pathogenesis is not fully understood. The main features of this syndrome are pain and soreness in the joint area, popping during movement, and impaired open mouth movement. Most of them are joint dysfunction and have a good prognosis; however, organic changes may occur in rare cases. Based on the medical history and the presence of the above-mentioned main symptoms, it is not difficult to diagnose TMJ disorder syndrome. Auxiliary diagnostic methods commonly used are: ① X-ray plain film (joint Xue’s position and condylar transpharyngeal lateral position), which can reveal the presence of joint space changes and bone changes, such as sclerosis, bone destruction and hyperplasia, cystic changes, etc. (2) Arthrography (upper cavity angiography is mostly used because it is easy to operate, but lower cavity angiography is less used in China) can reveal displacement of the articular disc, perforation, changes in the attachment of the articular disc and changes in the cartilage surface. In recent years, many scholars have used endoscopic examination of the joint to detect early changes in the disease, such as congestion, exudation, adhesions of the joint disc and synovium, and the formation of “joint rats” with undifferentiated and mature cartilage-like tissue. Since there are many types of the disease, the treatment varies. Therefore, a specific type of diagnosis should be made. For example, extra-pterygoid spasm, reversible articular disc displacement or articular disc penetration. Treatment measures: 1, correction of occlusal relationship by the dental specialist examination and treatment 2, closure therapy can be used 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 overly large open mouth. 3.Chloroethane spray with massage can relieve masticatory muscle spasm. When spraying chloroethane into a mist, intermittent spraying, 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, auditory gong, cheek car, hegu, with cataract, 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. Etiology: 1. Traumatic factors Many patients have a history of local trauma. For example, acute trauma such as impact, sudden biting of hard objects, over-opening of mouth (e.g. yawning), frequent chewing of hard food, grinding of teeth at night 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 have emotional impatience, mental tension, easily agitated and so on. 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. It may also be accompanied by temporal pain, dizziness, and tinnitus.