Neurology
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Headache is the most common nervous system complication at altitude; however, there have been few attempts to characterize clinical features of high-altitude headaches (HAH). ⋯ Headaches are a frequent complication of ascent to altitude. Older age appears to offer some protection, whereas headaches were more severe in women and persons with headaches in daily life. There is a wide clinical spectrum, with some suggesting intracranial hypertension. There is a need for evidence-based diagnostic criteria for headaches at altitude.