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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.
Pain on the side of the face that can radiate to the head or neck may be indicative of the jaw malady known as temporomandibular joint disorder (TMJ). But in many cases, the problem isn't the joint connecting the jaw to the skull, but muscular tension caused by clenching your teeth while under stress. Before you schedule that operation, ease tension in muscles that operate the jaw: Open your jaw as wide as you can, hold for a few moments, then gradually let it relax. You may feel more pain initially, but that's a function of muscle tightness; the discomfort should dissipate as you work the muscles.