Suddenly the mouth can not open feel the jaw bone stuck may be caused by temporomandibular joint dislocation, can be handled through manipulation or surgical incision and repositioning. Temporomandibular joint dislocation means that the condyle slips out of the joint fossa during the movement of temporomandibular joint, and cannot be restored to its original position beyond the joint nodes. Clinically, acute anterior dislocation is the most common. It occurs mostly as a result of sudden external impact. Its clinical manifestations are that the mouth cannot be closed, the jaw is displaced forward, the cheeks become equal, and the joint area may be accompanied by pain. Temporomandibular joint dislocation acute anterior dislocation is mostly reset by manipulation. Individual patients with excessive tension and difficulty in repositioning, temporal muscle and chewing muscle massage, or local closure with procaine, so that the muscles are relaxed and then repositioned. There are also a few cases of prolonged dislocation that are difficult to reposition, which require surgical incision under general anesthesia. If the above symptoms occur, it is recommended to go to the hospital in time for early and regular treatment.