RT Book, Section A1 Cutrer, F. Michael A1 Mathew, Paul G. A2 Bajwa, Zahid H. A2 Wootton, R. Joshua A2 Warfield, Carol A. SR Print(0) ID 1131932575 T1 Pathophysiology of Headaches T2 Principles and Practice of Pain Medicine, 3e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071766838 LK accessanesthesiology.mhmedical.com/content.aspx?aid=1131932575 RD 2024/04/25 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