) Left undiagnosed and untreated, this can eventually lead to joint damage, sometimes very severe, but often the first clue is a
sore, stiff
jaw, especially in the morning, pain when we yawn or try to open our mouths wide. Sneezing could conceivably cause pain. I would suggest a visit to your dentist who can X-ray your TM joint and see if there is damage. Most often, just looking at your teeth can tell him/her if your a grinder or a clencher.