Very rare – unilateral, orbital, supraorbital and/or temporal. Pain lasts 15-180mins but attacks occur multiple times a day (or at least on alternate days). Associated with autonomic features eg ipsilateral conjunctival injection, nasal congestion, forehead sweating, miosis, ptosis, agitation. Peak incidence in 20s, males predominate.

Can be episodic (bouts lasting 6-12 weeks every 1-2years) or else chronic.

Treat with high flow O2! Sumatriptan SC better than nasal, Zolmitriptan nasal preferred to oral or sumatriptan. Safe, licensed for kids.

Prophylaxis in adults is with verapamil!