This is my first post. I underwent an interbody spinal fusion back in 2006 from L4 through S1. I was OK for a while, but the pain came back. I tried everything including physical therapy, chiropractic, pain management, epidural blocks, facet blocks, etc. You name it, I tried it. I decided to visit my neurosurgeon earlier this year at the recommendation of my pain management specialist to discuss more surgery. The surgery was done in July of this year. They removed my old hardware (pins, rods, screws, etc.) and I was re-fused using something called BMP, some sort of synthetic bone paste. For the first 4-weeks after surgery, I felt 10-years younger. Then came week 5. Pain started shooting down my right leg and my right foot has been numb since the surgery. It was 10 times worse than pre-surgery. The only way I could obtain relief is by laying in a supine position (together with narcotic pain relievers). The ortho surgeon who assisted with the surgery suggested that I obtain a new MRI to see what was going on. There was a spinal fluid leak during the surgery which was repaired and he was concerned that a spinal fluid leak could be a possibility. The MRI revealed a large bilaterial fluid collection at L5-S1. Emergency surgery was scheduled for the next day and they opened me up again. Thank God, it was not a spinal fluid leak. The way it has been explained to me is that when they removed the old hardware, my body's natural reaction was to try to fill in the empty space with fluid; and that my body was also reacting to a new foreign material, the BPM, creating a "perfect storm" and a lot of fluid; they indicated that my body was not absorbing the fluid fast enough and that it had built up causing my pain. Two drains were inserted into my back to collect the excess fluid, and I was released from the hospital two days later feeling pretty good. The drain was removed before I left the hospital. It lasted about 10 days, until the leg pain returned again. I cannot sit for more than 10-15 minutes at a time. I just have to lay in bed in a supine position with a heating pad for relief. I am so frustrated right now, that I thought I would use this forum to vent. I meet with my neurosurgeon tomorrow to obtain a script for another MRI to see what is going on now. Does anyone out there know if this is normal for the body to create so much fluid after surgery like this? Or, could there be something else wrong preventing my body from reabsorbing this fluid? I would appreciate any info. Thanks.