Ultrasound Guided Radiofrequency Ablation of the Occipital Nerve

Inclusion Criteria: * Patients between the ages of 18-80 with a diagnosis of occipital neuralgia or migraine overlying the occipital region. * A diagnosis of occipital neuralgia will be based on the International Classification of Headache Disorders (ICHD), whose criteria include: paroxysmal stabbing pain in the distribution of the GON, tenderness over the affected nerve, and relief of pain for at least 3 hours after bupivacaine local anesthetic block of the affected nerve. * Patients may also be included if they have a diagnosis of migraine based on the ICHD criteria with predominance of pain over the occipital region that responded to occipital nerve block. * Patients must have failed oral medications including NSAIDs, opioids, and anticonvulsants for the management of their pain. * Failed treatment will be \<50% pain reduction with oral medication. * Patients must report headache frequency of at least 10 days per month. Exclusion Criteria: * Patients will be excluded from the trial if they have an unstable medical or psychological condition, * are pregnant, * have an implanted cardiac pacemaker or defibrillator that could not be disabled, * have had a craniotomy or scar tissue overlying the site from a previous surgery, * have a history of cervical spine fusion, * have evidence of elevated ICP or intracranial tumor, * or have previous RFA treatment of the greater or lesser occipital nerve.