I've done a few rounds of occipital nerve block injections over the last couple months. They helped with the headaches temporarily, but I might be eligible for an appointment with Dr. Duccic later this summer. Please keep me posted about your experience if you see him. I am holding off on pursuing this route because I am still awaiting a bloodwork test result for Lyme disease and I am currently doing HBOT with moderate success thus far (just started this week).