The correct name for temporomandibular joint disorder is temporomandibular joint disorder, and the severity of the disease is often determined clinically by clinical examination, arthrography, and arthrography. According to the severity of the disease, it can be divided into three stages: functional disorder stage, structural disorder stage and organic disorder stage. 1. Functional disorder stage: Clinical manifestations include pain in the masticatory muscles, which is severe at the trigger point of the facial fascia, and limitation of mouth opening. There are no pathologic changes within the temporomandibular joint on joint X-ray. 2. Structural disorder stage: clinical manifestations include joint popping, mouth opening limitation, joint subluxation and joint pain. X-ray examination of the joints shows changes in the joint space without bone destruction; arthrography shows abnormal position of the joint disk or expansion of the joint capsule. 3. Organic disorder stage: the clinical manifestations of the disease are long and recurrent, and there may be joint murmur, limited opening of the mouth, local pressure and pain, and abnormal opening type. X-ray examination of joints shows narrowing of joint space, degenerative changes of condyle and joint nodes; arthrography shows displacement, perforation or rupture of joint disk. The appearance of temporomandibular joint disorder disease, should be timely consultation, improve the examination, clear diagnosis, standardized treatment under the guidance of professional physicians.