Temporomandibular joint disorder (TMD) is one of the common diseases of the oral and maxillofacial area. According to clinical epidemiological studies, the disease is more common in young adults and middle-aged and elderly people, and the incidence is higher in women. The “four clinical manifestations” are as follows: ① Pain in the joint area. In general, joints do not suffer from pain for no reason. The pain of joint disorders is not obvious when you wake up in the morning, but will slowly increase with daily activities and eating, and may be accompanied by toothache and headache in severe cases. ② Abnormalities in the degree of opening or opening type. For example, if the opening is too large or too small, or if the mouth suddenly “gets stuck” when opening and closing, or if the corners of the mouth are obviously crooked when opening, these are all abnormalities of the degree or type of opening. ③ Joint popping and murmur. When opening or closing the mouth, you suddenly hear a “thumping” sound. ④Headache, neck pain, shoulder pain and ear symptoms. About 5% of patients have these or some other symptoms. There are various clinical methods for the treatment of TMD, and here we will specifically talk about “physical therapy”. As we all know, traditional physiotherapy is only physical factor therapy, while modern physiotherapy can be summarized by “3M”: ①Modality physiotherapy. It mainly relies on instruments. For TMD, the commonly used physical therapy are wet heat, ultrasound, short wave, low frequency electrotherapy, and laser. The purpose is anti-inflammatory, analgesic, and muscle spasm relief. ②Manual manipulation therapy. The main function is to increase the mobility of TMJ, that is, to increase its mobility in the “three-dimensional space”, including the degree of opening, forward extension, and left and right lateral deviation ③Movement therapy (3) Movement therapy. For TMD, the normal kinematics of the TMJ is restored by designing movements and retraining the nerve and muscle control under professional guidance. Physical therapy is still effective in treating TMJ disorders, especially as an adjunctive treatment method. However, it has limited effect on structural changes or osteoarthrosis, and cannot be used as the first choice of a single treatment mode, but as a “procedure” in a “sequence” of treatment.