Habitual dislocation of the jaw is medically called habitual dislocation of the temporomandibular joint, which is caused by laxity of the ligaments of the local joint capsule and weakness of the muscles. After a habitual dislocation of the temporomandibular joint occurs, physical therapy for the temporomandibular joint can be taken, and the strength of the occlusal muscles and the surrounding joint capsule, ligaments and muscles can be increased with limited mouth opening, and the habitual dislocation may be improved after the local muscle strength and joint capsule strength are improved. However, avoid laughing, eating hard food and over-biting, which can easily lead to temporomandibular joint dislocation. In addition, if the effect of temporomandibular joint habitual dislocation is not very satisfactory, surgery is recommended to improve the habitual dislocation of the temporomandibular joint by reconstructing the ligaments and joint capsule.