All I know is my Migraine Dr. says he wants to give me a nerve block for the Occipital Nerve, and he ways it is just numbing med's to calm down the nerve- he said it could last 5 years or so and then it might flare again. I am wondering though if it is going to be similar to the steroid injections I got in my lower back.... those hurt- they reminded me of my spinal tap.