TOPICS: Headache, dura mater, cranial nerves, extracranial structures, cluster, periorbital pain, nasal discharge, tearing eyes, horner syndrome, sumatriptan, verapamil, migraine, aura, CN V, vasoactive neuropeptides, nsaids, dihydroergotamine, beta blockers, amitriptyline, botulinum toxin, anti-cgrp monoclonal antibodies, tension, band-like pain, acetaminophen, behavioral therapy, subarachnoid hemorrhage, hydrocephalus, meningitis, trigeminal neuralgia, giant cell arteritis
