Most severe, Common in males, Up to 8x/day—>cyclical, Mistaken as sinus allergies, Trigeminal autonomic cephalalgia—>runny nose/congestion, Usually occur at same time of day/night, Unilateral pain reported as sharp and stabbing (around eye), Swelling around eye, tearing, facial flushing, pallor, nasal congestion, pupil constriction, agitation, restless, auras