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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.
This tends to be especially true of jaw pain and most jaw and tooth discomfort. The association between anxiety and jaw pain isn't always obvious, but there are generally two causes: 1  Facial Tension All forms of facial tension may lead to jaw pain. 2  You may not realize you're tense either. 3  Hormones in the body can tense your muscles and joints even without any action from you.