I have not been diagnosed with SNF but I have suffered severe nerve suppression in a large part of the lumbar area due to stenosis, disc and other deteriorations. I experienced symptoms of numbness and pain in my spine, right buttocks, leg and foot-not quite the same as you but close enough. My neurosurgeon emphasized that the PHYSICAL pressure had to be reduced or eliminated in order for the symptoms to be reduced or eliminated, which made total sense to me. All the needed corrections entailed two surgeries and I am now 7 months out from the second, with a years time of healing being the norm. Since that is the case I am not sure of total success, but so far it seems fairly promising. For me, surgery was my only workable option in my opinion since no other modality could properly address the nerve compression. Although the most invasive it is the most effective for relieving this type of nerve trauma.