Hi, I have a 6 month old. Had her via scheduled c-section. No trauma. In case there is a relation. I have been having pain in/on my left pectoral muscle for the last 3 weeks I rubbed some A535-type lotion and it helped a little but there is still bruise-like pain. It hurts when I force to pick up baby or bend down or press on it with my fingers. No pain when I breath . I would say it does feel like there is a swelling there, but I am not sure if it s a bump or only the muscle I am feeling. It isn t under the breast it really is from the center of both breasts, on the left side of that. When I roll over in bed, it also hurts. Could I have pulled something due to repeated movements with baby all day?