IL6 and Myalgia: The results are partly consistent with previous results in other localized myalgias showing increased IL-6 in the painful trapezius muscle of WAD patients [23] and IL-1β and TNF in myofascial trapezius trigger points [21, 22], although one early study did not find any difference in trapezius levels of IL-6 between patients with chronic trapezius myalgia and controls [37].