I've had this strange feeling in my back for a few months now. It has me concerned, because I don't know what it is. It's not painful or anything like that, but it feels like something is growing in there, and that is why I'm worried. It's right below my left shoulder blade, and it feels very internal...nothing I can feel to the touch. But it seems when it acts up, that it's a pretty large area. It feels kind of like a gnawing or pulling sensation when I feel it. Any thoughts anyone? Every day I feel it, I get a little more worried. I don't notice or feel it everyday, but I'd say at least 4-5 days a week I experience the feeling many times a day.