Tried occipital and a spheno ganglion block, neither worked, the occipital one triggered one when it sent a jolt along that nerve into my temple, also rather unpleasant with the needles in the back of the head and even more so the one up the nose, so do not blame you for not wanting to try that, I know botox is a semi regular suggestion for migraines and have heard it attemted for cg, but again it is another of those "Oh, yeah here try something else that is basically anecdotally helpful" lol