A distinctive episodic syndrome of headaches. The most common cluster headache pattern, acute cluster headache, is characterized by one to three short attacks of pain each day around the eyes, clustered over a stretch of 1 to 2 months, and followed by a pain-free period that averages 1 year. The other main pattern of cluster headache, chronic or ep [..]

Headaches that occur in groups, or clusters, over a period of several weeks or months separated by headache-free periods of months or years. Cluster headaches include sharp, penetrating pain around or [..]

primary headache syndrome characterized by intense, unilateral orbital, supraorbital, and/or temporal pain lasting 15-180 minutes and occurring in "clusters" up to several tim [..]

Severe pain that occurs suddenly and affects one side of the head, including the face and neck

A short-lived, extremely painful headache that occurs repeatedly over a period of a few weeks or months and then disappears for months or years.

A Primary Headache Disorder that is characterized by severe, strictly unilateral Pain which is orbital, supraorbital, temporal or in any combination of these sites, lasting 15-180 min. occurring 1 to [..]

A primary headache disorder that is characterized by severe, strictly unilateral PAIN which is orbital, supraorbital, temporal or in any combination of these sites, lasting 15-180 min. occurring 1 to [..]

(pathology) An extremely painful, cyclical and unilateral headache