Blunt, Rajwani, and Guerriero (1997) concluded that chiropractic treatment of fibromyalgia resulted in clinically significant improvement in flexibility and pain levels. The authors recommended that chiropractic treatment be included in a multidisciplinary treatment regimen for fibromyalgia.

References:
Blunt, Kelli L., Moez H., Rajwani, and Rocco C. Guerriero. 1997. The Effectiveness of Chiropractic Management of Fibromyalgia Patients: A Pilot Study.” Journal of Manipulative and Physiological Therapeutics 20, no. 6: 389-399.