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The temporomandibular joint connects the lower jaw to the temporal bone of the skull and is responsible for bringing the lower and upper jaws together. It is one of the most frequently used joints in the body. Depending on the underlying cause, jaw pain can occur suddenly or build up over time.
1 Listen to and feel your jaw and ear area, and ask you to open and close your mouth. 2  Examine your teeth, bite, and the alignment of your jaw joints.  Note if your teeth have any abnormalities that could be causing your jaw pain or could indicate that you grind or clench your teeth.