I'm new to this board. I've spent so much time on the "back board" and didn't think I would be here. History...work injury (caught a falling IV pump) and herniated L5-S1 (piece of disc actually broke off), laminectomy ~4 1/2 months ago, two ESI's with temporary relief, still having "nerve" pain in buttock, hip, leg, and foot on right (where injury was) but now also on left. MRI last week shows no more disc material or herniation. Have been on Lyrica and pain meds. Now doc wants to do a sympathetic nerve block. From research I see that he may be looking for RSD. I don't have all of the symptoms, I do have burning pain in both legs (not always the same amount of pain), can't sleep at night, covers hurt to touch legs, no temp or color changes. One site I saw mentioned migraine headaches and I have had two this week alone and I usually just get them about every 4-6 months. Will the nerve block tell him if this is RSD? Will it help the pain for long? Any input would be greatly appreciated.