e/International Classification of Headache Disorders

Information
has gloss	eng: The International Classification of Headache Disorders (ICHD) is a detailed hierarchical classification of all headache-related disorders published by the International Headache Society. It is considered the official classification of headaches by the World Health Organization, and, in 1992, was incorporated into the 10th edition of their International Classification of Diseases (ICD-10). Each class of headache contains explicit diagnostic criteria—meaning that the criteria includes quantities rather than vague terms like several or usually—that are based on clinical and laboratory observations.
lexicalization	eng: ICHD-2
lexicalization	eng: ICHD
lexicalization	eng: International Classification of Headache Disorders
instance of	(noun) pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs headache, head ache, cephalalgia