The temporomandibular joint is the only joint of the face, and its structure and movement are among the most complex in the human body. The movements of chewing, speech, swallowing and expression in our daily life depend on the normal participation of the TMJ. TMJ disorder is a common disease in the oral cavity with a high prevalence in the population and is one of the most common diseases of the oral and maxillofacial region besides dental caries, periodontal disease and malocclusion. According to statistics, the prevalence rate is 28-88%. The causes of TMJ disorders are complex and related to a variety of factors. The common ones include mental factors, such as anxiety, irritability, nervousness, agitation and insomnia, etc.; occlusal factors, the examination of TMJ disorder patients often reveals symptoms such as multiple missing teeth, severe wear and tear of teeth, and irregularities in tooth alignment, etc. In addition, patients often have bad habits like chewing hard food, grinding teeth at night, and clenching teeth when nervous, all of which can cause damage to the temporomandibular joint. The clinical manifestations of TMJ disorder are diverse, mainly including pain in the muscles around the preauricular area or joints when opening and biting food, which is sometimes mistaken for toothache or trigeminal neuralgia by patients, and because the pain is not very intense, it is often overlooked and the time for early treatment is delayed. In some cases, the pain is often overlooked because the pain is not very severe, and early treatment is delayed. Some patients also have a sound such as “ka, ka” or “ka ba” when opening the mouth. In addition, TMJ disorder is often accompanied by many other symptoms, such as tinnitus, deafness, dizziness, etc. Therefore, when you have the above symptoms and cannot find any other reasons, do not forget to go to the dental hospital to have your facial joints checked. Since the temporomandibular joint is always in an active state when we talk and eat, even when it is sick, it cannot be fixed like other joints in the body to get a good rest, so once it is sick, its treatment is a rather complicated process. The Department of Prosthodontics of Jiangsu Provincial Stomatological Hospital has many years of clinical experience in treating temporomandibular joint disorders. In addition, it has introduced the internationally advanced T-SCAN computerized occlusion analysis system and crop aluminum arsenic laser treatment machine, which are of great help in the diagnosis and treatment of joint disorders. We hope that you will not neglect your facial joints while paying attention to your whole body health.