ArticlesHeadache Continuum: Concept and Supporting Evidence From Recent Study of Chronic Daily HeadacheSpierings, Egilius L. H. M.D., Ph.D.Author Information Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, U.S.A. Received November 3, 2000; revised July 13, 2001; accepted September 26, 2001. Address correspondence and reprint requests to Dr. Egilius L. H. Spierings, 25 Walnut St., Ste. 102, Wellesley Hills, MA 02481-2106, U.S.A.; e-mail: [email protected]; http://www.headacheMD.com The Clinical Journal of Pain: December 2001 - Volume 17 - Issue 4 - p 337-340 Buy Abstract A headache continuum on the basis of the dynamic nature of headache is presented, with episodic headaches developing into daily headaches and vice versa. The concept is supported by evidence from recent study of (gradual-onset) chronic daily headache. © 2001 Lippincott Williams & Wilkins, Inc.