Key Chapter Points
Headaches caused by readily identifiable, underlying conditions (e.g., trauma, meningitis, subarachnoid hemorrhage, etc.) are called secondary headaches. Primary headaches are headaches without a readily identifiable, underlying medical condition (e.g., migraine, tension-type, and cluster headaches). ED headache diagnosis should focus on differentiating primary from secondary headache, rather than determining a specific primary headache diagnosis. Six essential questions can help determine why patients are presenting to the ED and whether they are likely to have a secondary headache. An effective, focused screening neurological examination can generally be performed in about 5 minutes. Imaging studies are usually unnecessary for patients with chronic headaches without alarm signs or symptoms. Patients >50 years old with a new headache should be screened for giant cell arteritis. Other causes, such as primary and metastatic cancers may also need to be considered.
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Marcus, D.A., Bain, P.A. (2012). Getting Started. In: Practical Assessment and Treatment of the Patient with Headaches in the Emergency Department and Urgent Care Clinic. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-0002-8_2
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