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Medical Term:

cluster headache


possibly due to a hypersensitivity to histamine; characterized by recurrent, severe, unilateral orbitotemporal headaches associated with ipsilateral photophobia, lacrimation, and nasal congestion.

Synonym(s): histaminic cephalalgia, histaminic headache, Horton cephalalgia, Horton headache

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.