Comparison of greater occipital nerve blockade with radiofrequency and steroid in chronic migraine.

Objectives: The study aims to retrospectively compare steroid and radiofrequency treatments for the greater occipital nerve(GON) under ultrasound guidance in chronic migraine.

Methods: Monthly average headache attack frequency, attack duration, visual analog scale(VAS) and the number of days analgesics were taken were recorded. Under ultrasound guidance, GON block was administered once a week for a total of four sessions.