This past summer I hurt my back at work. I hurt a muscle just below my left shoulder blade. I was lifting something that I underestimated, and kind of pulled the muscle. I would rest it, and it would get a little better, until I would lift something (no matter how heavy), and the muscle would 'grab', with intense pain. Then it would take two or three days to recover, and after about a week or so, it would happen again. This happened until I quit work to go back to school, where I rested it for a few weeks. However, now that I am doing BJJ again, while doing some rolls, I felt a little bit of pain in that same muscle again, and while it doesn't hurt, I'm worried it will happen again. What the fuck is wrong with this muscle??