TY - CHAP M1 - Book, Section TI - Pathophysiology of Headaches A1 - Cutrer, F. Michael A1 - Mathew, Paul G. A2 - Bajwa, Zahid H. A2 - Wootton, R. Joshua A2 - Warfield, Carol A. PY - 2016 T2 - Principles and Practice of Pain Medicine, 3e AB - Headaches are estimated to affect more than 90% of the general population at some point in their lives1 and may be encountered by physicians in a wide variety of clinical settings. Headaches can be divided into two major categories. The overwhelming majority of recurrent headaches are primary headache disorders, in which no identifiable underlying cause can be found. Secondary headache disorders are symptomatic of an underlying pathological cause. Secondary headaches can be due to causes such as transient viral illness, intracranial tumor, aneurysm, or drug withdrawal (for differential diagnosis of secondary headache disorder, see Cutrer2). Prevalence studies indicate that a benign process, such as a mild febrile illness or alcohol withdrawal, usually causes secondary headaches and that the lifetime prevalence of headache resulting from more ominous intracranial structural lesions is less than 2%.3 SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/11/12 UR - accessanesthesiology.mhmedical.com/content.aspx?aid=1131932575 ER -