Injections for lower back were not helpful. so i was reccomended for nerve burning, but i was told if injections were useless so would burning the nerve procedure. is that true?

Yes: Permanent destruction of the nerves will be of no value if the temporary suppression with injection was not successful. Injections with alcohol, sectioning, and burning all destroy the nerves. Unfortunately, the nerve stubs can still register pain and cause even worse pain then when they were intact.

Nerve ablation: Nerve blocks are done first to approximate what may be achieved by a nerve ablation procedure. Some practitioners do go ahead and perform the ablation procedure even when the nerve blocks have not helped. I have not seen success in such situations.