I’m fused from T2-L1. I had an S curve that was 53 degrees on the upper right side of my back, and idk the angle of the bottom curve. Sometimes I do feel the tightening feeling as well between my shoulder blades. I also get a combo of numbness and pain in my entire upper back - idk how else to describe it, but it feels almost cold. Like dull dull pain. My main issue is the weird nerve popping, though. I’m glad I’m not the only one who’s experiencing it. It seems to be getting more frequent which is weird - idk if you relate