International Classification of Headache Disorders
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![PDF] The International Classification of Headache Disorders, 3rd ...](/imgres?imgurl=https://d3i71xaburhd42.cloudfront.net/74d264c2c2bf58475fe106f092795c380d1a9ae3/48-Table1-1.png&imgrefurl=https://www.semanticscholar.org/paper/The-International-Classification-of-Headache-3rd-Olesen-Bes/dc31ccc516d9b6151abbf80a7b5a0161bc70317d&h=1414&w=1346&tbnid=47TkeE29E7xYzM&q=International+Classification+of+Headache+Disorders&tbnh=150&tbnw=143&usg=AI4_-kSf9Gx6za2bu_3oMUIu56YCTWQHBQ&vet=1&docid=2zKKQpQQ3ZgZ-M&sa=X&ved=2ahUKEwiSsPuX2_OFAxXSq4kEHXzWCW0Q9QF6BAgAEAU)
The International Classification of Headache Disorders is a detailed hierarchical classification of all headache-related disorders published by the International Headache Society. Wikipedia