Headache is defined as a pain reported of the head, usually above the eyebrows, which can be a disorder itself or caused by other disorders. According to the second edition of the International Classification of Headache Disorders [1], all the different headache disorders can be classified into major groups, and each group is then subdivided into types, subtypes and subforms.

Headache disorders can be classified into major groups, with each group subdivided into types, subtypes, and subforms, and each type can be further subdivided into subforms.

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Headache and Facial Ache

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