Ever since I hit 14 or 15, I've had this annoyance that always bugged me. After every day, whether I worked hard or not, as I lay down to sleep, once I exhale I get a pain go all throughout my back. It's never been unbearable pain and usually goes away after 3 or 4 exhales, so I never felt like going or asking someone about it, but, I find myself on this website and I'm curious, so if anybody has any information, thanks.