cluster headache

cluster headache   n.  A recurring headache similar to migraine and characterized by severe pain in the eye or temple on one side of the head, watering of the eye, and a runny nose.

Main Entry: clus·ter headache
Pronunciation: 'kl&s-t&r-
Function: noun
: a headache that is characterized by severe unilateral pain in the eyeor temple, affects primarily men, and tends to recur in a series of attacks called also histamine cephalalgia, histamine cephalgia, Horton's syndrome

cluster headache clus·ter headache (klŭs'tər)
n.
A recurring headache marked by severe pain in the eye or temple on one side of the head, usually occurring in males. Also called erythroprosopalgia, histaminic headache.

cluster headache   (klŭs'tər)  Pronunciation Key  A recurring headache, most common in males, characterized by severe pain in one eye or the adjacent temple, watering of the eye, and runny nose.