Had lumbar disc decompression March 2015 because of numbness in calves and feet and nerve pain in left butt cheek. Diagnosis spinal stenosis. Numbness and nerve pain gone when I left hospital after day surgery. 6 weeks later nerve pain in butt cheeks came back mostly left side but sometimes right side too. First 5 weeks it felt like I died and went to heaven it was so great. Went back to doctor and had another MRI and no spinal stenosis or reoccurring disc herniation. Doctor said because MRIs are lying down and the nerve pain is only weight bearing when I am standing g but mostly when walking. Used to walk 4 miles per day but can't do 1 mile without nerve pain. Doctor sent me for a flex ion/extension X-ray. It revealed spine not stabilized, out by almost 1/4" which is causing rubbing on the nerves thus causing nerve pain. He said I need a fusion in the same spot as the decompression was done. He said he doesn't like to do a fusion unless he has to. In my case because my spine is not stable, too much play, it is necessary. When I had my surgery in March it took about a month to recuperate. I read lots and lots of posting on this site and I am having a hard time finding positive experiences. This is scaring me.