Xiao Wang is 26 years old, engaged in copywriting work, in the past six months at work in the afternoon always feel pain in the head and occipital region, the pain disappears when waking up in the morning, the first two months Xiao Wang thought that the work is more tired resulting in sleep deprivation, didn’t pay much attention to it, but the pain sometimes affects the work, Xiao Wang felt that he had to go to the hospital to check it out, after a detailed examination of the relevant specialties (MRI of the head does not show any abnormality), Xiao Wang suffers from Temporomandibular joint disorders (TMD). Temporomandibular joint disorders (TMD). Her colleagues around her had never heard of this disease, and Wang was very puzzled. She had the habit of chewing on one side, but how did she suffer from this strange disease, and how could it cause headaches? After the doctor’s detailed account, Xiao Wang has a certain understanding of the causes, symptoms and treatment of this disease. Temporomandibular joints are the most complex joints in the whole body, consisting of condyles, discs, capsules, fossae and ligamentous muscles, etc. They are hinged joints with bilaterally linked movements. tmd is prevalent in young women and has the highest incidence at the age of 20 to 30. it starts on one side and then progresses to the other. It starts on one side and gradually involves both sides, with a long course of several years or more than ten years, and is often recurrent. The etiology is complex and has not been fully elucidated. It is related to maxillofacial (malocclusion, diastema or diastema), psychiatric factors (night grinding due to stress at work or study), asymmetric development of bilateral temporomandibular joints, unilateral mastication habits, or frequent mastication of hard food, etc. The development of TMD is generally divided into three stages. The development of TMD can be divided into three stages. The first stage is masticatory muscle dysfunction disease, which is mainly manifested as restricted opening and pain in the eyes, occiput, neck and temporal region, accompanied by a stuffy feeling in the affected ear, and the pain is aggravated during chewing movement. The second stage is the joint structure disorder, mainly for all kinds of reversible or irreversible joint disc displacement, joint capsule laxity, expansion, etc. Its main clinical manifestations are at the end of the opening and closing of the mouth at the beginning and/or at the beginning of the opening and closing of the mouth at the end of the opening and closing of the mouth, the joint area occurs one or two “吭.吭 “thud sound, accompanied by the opening of the type of obliquity, and the irreversible anterior displacement of the disc is mostly accompanied by the opening of the restricted opening. The third stage is osteoarthropathy. The third stage is osteoarthropathy, which is characterized by destruction of the condyle, articular tuberosity, articular recess or perforation or rupture of the articular disk. The main manifestation is the restriction of opening, accompanied by multiple crushing or grinding sounds when opening and closing the mouth. Diagnostic methods for TMD include temporomandibular joint films, upper arthrography (injecting organic iodine solution into the upper cavity of the articular disk), lower arthrography (injecting the same contrast agent into the lower cavity of the articular disk), MRI of the temporomandibular joint in the opening and closing position and temporomandibular arthroscopy, which can show the morphology, position, perforation, rupture, etc., of the articular disk on the upper and lower parts of the joint. TMD treatment must be chosen differently depending on the pathogenetic factors and stage of development. In patients with masticatory muscle dysfunction, oral analgesic medication, physical therapy, and hot compresses can relieve symptoms; in patients with reversible anterior disc displacement, TMJ lavage, dilatation, and combined jaw cushioning can be used; in patients with irreversible anterior disc displacement, arthroscopic disc reset and fixation (placing and fixing the displaced discs in their original position) and jaw cushioning can relieve symptoms; in patients with mild osteoarthropathy, arthroscopic disc perforation and rupture of the discs can be performed. In patients with mild osteoarthropathy, arthroscopic repair of disc perforation and restoration of the bony encumbrance can be performed; in severe cases, open surgery can be considered to replace the condyle and the disc; if there is any abnormality of the jaw factor after symptomatic relief, appropriate treatments must be carried out in order to avoid the recurrence of TMD.