The main clinical symptoms are: First, the patient’s mouth is wide open and cannot be closed naturally. The inability to close the mouth leads to unclear speech, drooling, and inability to chew and swallow normally. Second, if there is a unilateral dislocation, it will make the lower jaw show a shift of the chin midline in the process of downward movement, making the chin midline deviate to the healthy side. During clinical palpation, it can be found that the joint fossa in the area of the joint fossa in front of the ear screen is very empty and there is a depression of the joint fossa. In the clinical treatment of acute dislocation of the joint, it is necessary to go to the hospital to reset the joint and then use an elastic bandage to restrict the joint movement, and also to avoid opening the mouth widely in order to prevent recurrence of joint dislocation.