I have had two laminectomy/disectomies on my L5/S1 due to herniations. My surgeries were 17 months apart. My last surgery was in August of 2008 and my pain has increased. Does anyone know what I mean by a "locking" or "freezes in place" feeling exactly in my L5/S1 disc area? Could this be because disc material is gone? :?? My OS said that between the two surgeries he has removed about 75% of that disc material. Is this a normal procedure? :? Anyway, my sciatic pain has returned in my left leg and I am scheduled for a repeat MRI on October 10th. Does anyone have suggestions or comments on what I might be feeling or what I might be facing? :SS Thanks for any input!