TY - CHAP M1 - Book, Section TI - Epidemiology of Headaches A1 - Schwartz, Daniel P. A1 - Sollars, Mark A1 - Grosberg, Brian M. A2 - Bajwa, Zahid H. A2 - Wootton, R. Joshua A2 - Warfield, Carol A. PY - 2016 T2 - Principles and Practice of Pain Medicine, 3e AB - Headache is a common pain symptom that inflicts a substantial burden on individuals and on society. Headache has many causes; a range of headache diagnoses was defined for the first time by the International Headache Society (IHS) in 1988 in the first edition of the International Classification of Headache Disorders (ICHD-1).1 The second edition of the International Classification of Headache Disorders (ICHD-2) was published by the IHS in 2004, and the third edition (ICHD-3 beta version) was published in 2013.2,3 The ICHD-3 beta version classifies headache disorders into three major categories: (1) primary headaches; (2) secondary headaches; and (3) painful cranial neuropathies, other facial pains, and other headaches. Secondary headache disorders result from an underlying condition, such as a sinus infection or brain tumor. In primary headache disorders, the headache disorder is the fundamental problem. The primary headaches include four categories: migraine, tension-type headache (TTH), trigeminal autonomic cephalalgias (TACs), and other primary headache disorders. The two most common types of primary headache disorders are episodic tension-type headache (ETTH) and migraine. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/05 UR - accessanesthesiology.mhmedical.com/content.aspx?aid=1131932461 ER -