Abstract

The International Headache Society (IHS) has revised the International Classification of Headache Disorders (ICHD-II) recently. They added some new disorders and new section for headache disorders associated with psychiatric diseases to first edition of the classification. They also modified and added some new diagnostic criteria. For research purposes they attached an appendix that included some alternative diagnostic criteria or provisional new entities. In this review new features and clinical utility of the ICHD-II will be discussed. Korean Journal of Headache 4(2):101-108, 2003