to be honest i'd have this checked out. chronic tmj disorders can be caused by an injury like the one you describe. it's even possible you suffered a small fracture. at any rate the sooner you have it checked out the more effective treatment might be at heading off ongoing problems. you don't need to rush to the emergency room but you might call your primary care provider for an evaluation. he or she might want to take an x-ray just to be sure there's no break. your provider also can give you more specific information about the prognosis. good luck to you! the examination might include pressing on (palpating) the jaw muscles for soreness or asking the patient to open and close the jaw in. in most cases x rays and mri scans of the temporomandibular joint will be normal. . in many cases the cause of pain in the tmj area is temporary and disappears without treatment. <link>
how long after being hit in tmj area should pain be sharp when touching it and opening mouth? . was in head to head collision and got hit right on tmj area. extreme tenderness to area and sharp pain when open mouth wide. no other symptoms. could it just be bruised or should i have it checked out?