Utilization of 60-Day Peripheral Nerve Stimulation of the Occipital Nerves for the Treatment of Headache

Inclusion Criteria: * Diagnosis of a headache disorder for which the treating clinician has independently made the clinical decision to proceed with temporary 60-day occipital nerve PNS as part of routine care, including: * Occipital neuralgia * Chronic migraine * Chronic tension-type headache * Chronic cluster headache * Cervicogenic headache * Clinically scheduled to undergo temporary 60-day occipital PNS as part of routine care. * Ability to provide informed consent. Exclusion Criteria: * Inability to provide informed consent. * Coagulopathy that would prohibit PNS placement. * Severe psychiatric illness interfering with participation.