hi whiteaa. i had eight stellate ganglion nerveblocks in my neck (one a week) when i was first diagnosed with rsd. they helped a little with outward swelling and pain but not alot. but everyone is different. the first one i got didn't really help much at all. my pm dr told me that it sometimes takes a few trys before i would feel results and i did. they just weren't really big results. but something is better then nothing and everyone is different. i'm not a dr and don't know for sure what a spinal injection is so if i were you i would talk to you dr about it. sending soft hugs your way.