I've been dealing with this for a month or so. It started when I think I pulled or strained a muscles while doing a warmup bench too quickly. The pain comes from the upper back, right around where the tip of my left shoulder blade is. Some people get lower back pain because they arch their back while doing a heavy press, but I don't do that. The pain is only apparent when I finish my lowering phase, hold it and am about to press upwards. It's right after I hold it, right when I start to push, that this subtle yet uncomfortable pain comes from my back. Anyone else experienced this and know how to make it stop? I do bench with my feet on and off the ground, and both ways the pain is still there. I've taken a 1 to 2 week break and it still comes back.