I had back surgery in September 2010, wake up with foot drop. My surgeon left a piece of disc that causes me continous pain. Foot tendon transfer in March of 2011. Another back surgery on April 23rd, 2012 to redo diskectomy. Another back surgery on April 28th to repair a hematoma and 1 inch cut on my dura. Another back surgery on Sept. 14, 2012 to repair a CFS leak. My surgeon said it was caused by a needle puncture in the last back surgery. Question: would it be possible that I may still have a leakage? I am having headaches everyday.