Temporomandibular joint disorder is a disease mainly caused by a variety of reasons, often with joint pain, strange sound and difficulty in opening the mouth and other performance, need to be distinguished from tumors or arthritis, need to promptly consult the relevant system for treatment, the effect of treatment is better, does not affect normal life, causing disorders have a variety of reasons. 1, mental factors: mental overstrain may have the disorder, need to calm the mind, relaxed mood. 2, trauma caused by: car accident impact, bite hard objects, open mouth yawning may cause acute trauma, when it is easy to appear disorder, often eat hard objects or grinding teeth and other long-term activities caused by joint damage, etc. will occur temporomandibular joint disorder. 3, the occlusion is affected: grinding teeth or bad repair will cause TMJ disorder, which is related to the destruction of the joint structure and is one of the main reasons for the disorder. 4. Systemic diseases: Patients with rheumatoid arthritis are prone to disorders, which are mainly caused by rheumatic factors moving to the jaw joint and leading to dysfunction, and can be relieved by treating arthritis. TMJ disorder can be diagnosed in a variety of ways, the best way to confirm the diagnosis is MRI, which can diagnose the cause at once, without the need for multiple examinations, and after diagnosis, symptomatic treatment is required to avoid aggravation of the disorder affecting life, and diet is mainly soft food as far as possible.