The 3rd edition of the International Classification of Headache Disorders (ICHD-3) may be reproduced freely for scientific, educational or clinical uses by institutions, societies or individuals. Otherwise, copyright belongs exclusively to the International Headache Society. Reproduction of any part or parts in any manner for commercial uses requires the Society’s permission, which will be granted on payment of a fee. Please contact the publisher at the address below.
©International Headache Society 2013–2018.
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The International Headache Society (IHS) expressly permits translations of all or parts of ICHD-3 for the purposes of clinical application, education, field testing or other research. It is a condition of this permission that all translations are registered with IHS. Before embarking upon translation, prospective translators are advised to enquire whether a translation exists already in the proposed language.
All translators should be aware of the need to use rigorous translation protocols. Publications reporting studies making use of translations of all or any part of ICHD-3 should include a brief description of the translation process, including the identities of the translators (of whom there should always be more than one).
IHS will not endorse translations. Endorsements may be given by member national societies; wherever these exist, such endorsement should be sought.

The International Classification of Headache Disorders, 3rd edition