Temporomandibular joint dysfunction is a blanket term that refers to pain and dysfunction of the jaw muscles and the tempomandibular joints which connect the mandible to the skull. The most common symptoms are pain and restricted mandibular movement as well as grinding noises coming from the joint. This condition is more common in women then in men, and affects a large portion of patients suffering from fibromyalgia. Trigger points in the muscles of mastication are frequently involved in TMJ dysfunction. Trigger points in the pterygoid and masseter muscles for example will not only refer pain into the tempomandibular joints, but will also cause a dysfunctional movement pattern that can restrict range of motion. Trigger point therapy can be an effective modality to treat TMJ dysfunction.