Age

18–80

Sex

ALL

Healthy volunteers

Not accepted

Patients who have a diagnosis of migraine with medication overuse headache according to ICHD-3 criteria confirmed by a neurologist
Female patients will be screened for pregnancy planning and married female patients must undergo a urine pregnancy test

Patients who have other types of headache disorders other than migraine
Patients who have a previous history of allergy to corticosteroid or lidocaine
Patients who had previous skull surgery
Pregnant women
Patients with a history of uncontrolled depression, or psychosis
Patients who get or plan to get CGRP-targeted therapies or botulinum toxin injection
Patients with an increased risk of bleeding or underlying bleeding disorders

Greater Occipital Nerve Block for Migraine With Medication Overuse Headache