International Classification of Headache Disorders (ICHD)
The International Classification of Headache Disorders (ICHD) is an algorithmic system to define and classify all known headache disorders. It is divided into primary headache disorders such as migraine and symptomatic headaches which are a symptom of a different disorder.
The ICHD presents classification criteria, comments and further information for headache disorders; it is revised from time to time and is now in its 3rd edition.
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International Classification of Headache Disorders (ICHD), 3rd Edition – 2018
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ICHD-3 Abbreviated Pocket Version
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ICHD-3 slide kit
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International Classification of Headache Disorders (ICHD) (3rd Edition) – translations
Translations of the ICHD-3 are available in several languages, translated by IHS Affiliate Member Societies.