I am 7 weeks post TLIF L4-S1 with hardware and soft stabilization L3-4. My recovery has been pretty good. 3 days ago I was sitting and all of a sudden I got an electric shock sensation in the center of my left buttock that made me literally jump! Got another one a few minutes later. Since then, have had several episodes a day. No warning signs, no radiation, no residual pain, just a "zap" that is very painful. Not sure if it is nerve waking up or what? Getting kind of concerned. Has anyone else experienced this or have any thoughts? I have been sitting a lot more recently as I have gone back to work. Hope that hasn't done damage!