Pain: Aching or sharp pain in the jaw joint, face, neck, or ear. Tenderness: Sensitivity to touch in the jaw joint or surrounding muscles. Stiffness: Difficulty opening or closing your mouth, or limited jaw movement. Locking: The jaw may become locked in an open or closed position. Clicking or popping: Sounds may be heard when opening or closing the mouth. Headaches: Frequent hea... https://www.tmjsleepclinic.com/temporomandibular-disorders-tmj/