Is jaw pain a symptom of fibromyalgia?

The presence of jaw pain is now being considered in the widespread pain index (WPI) for the new proposed diagnostic criteria for fibromyalgia.

Temporomandibular dysfunction (TMD) most popularly known as TMJ, and bruxism (teeth grinding) are two common sources of jaw pain, and both can be perpetuators of headaches, which is part of the symptoms severity score in the proposed criteria. Both can be attributed to the presence of myofascial trigger points.