A type of headache characterized by repeated attacks of unilateral pain lasting 15 to 180 minutes and associated with local autonomic signs. [https://orcid.org/0000-0002-0736-9199, pmid:21912573]

Cluster headache is a neurological disorder characterized by recurrent severe headaches on one side of the head, typically around the eye(s). There is often accompanying eye watering, nasal congestion, or swelling around the eye on the affected side...