Abstract
Chronic daily headache (CHD) refers to a category of headache disorders that are characterized by headaches occurring on more than 15 days per month. This category is subdivided into long- and short-duration (>4 or <4 hours) CDH disorders based on the duration of individual headache attacks. Examples of long-duration CDH include transformed migraine (TM), chronic migraine (CM), new daily persistent headache (NDPH), acute medication overuse headache, and hemicrania continua (HC). The goal of this review is to enable clinicians to accurately diagnose and effectively manage patients with long-duration CDH. Patients with CDH often require an aggressive and comprehensive treatment approach that includes a combination of acute and preventive medications, as well as nondrug therapies.
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