Sorry no one replied! I don't remember my butt being sore past when I stopped, but it might have been for a bit. I think I had knots for a while but they faded. It feels fine now, though! I hope your pains go away soon!
I feel like I'm having more pain now, than I did in the last few weeks of actually doing the PIO. I get a lot of sharp pains right in the area where we were doing injections. I've never had any welts or lumps.
Now that I think about it, it could be totally unrelated to the PIO. I've had other issues with sciatic pain in my leg, so maybe it's related to that? Who knows....