The jaw will move from side to side cackle may be due to jaw joint laxity, jaw joint disorder syndrome, trauma and other reasons related. 1. Laxity of mandibular joint: mandibular joint consists of mandibular head and mandibular fossa of temporal bone, left and right united, lateral for medial and lateral ligaments. When the mandibular joint is traumatized, congenital malformation of joint development, or when the bite force is too large for a long time, it may lead to laxity of the ligaments of the mandibular joint, and habitual dislocation of the mandibular joint occurs, and there may be a situation that the jaw will thump when moving from side to side. 2. Mandibular joint disorder syndrome: the cause of mandibular joint disorder syndrome is still unclear, it is thought to be related to the patient’s emotions, joint trauma, autoimmunity and other factors. 3. Trauma: If the patient suddenly loses control of emotions and bites hard objects or suffers from trauma, it will lead to excessive pulling of the condyle, stretching or tearing of the joint and its surrounding ligaments, resulting in joint displacement, which may cause the jaw to move from side to side and thump. If the symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner, to clarify the cause and then give targeted treatment.