The only thing that has ever relieved my back pain to the point of me feeling normal is Cannabis.
I have chronic back pain and am on crap pain medicine (opiod - non-opiods) that only slightly helps.
I hate taking pills, but until it's legal for me to use, I'm stuck with no relief.
It does relieve chronic pain.
How it feels, is like the pain is still there, but it's not pain, it's another feeling that's still there, but it doesn't hurt at all.