pain at shoulder blade with nerve issues

I have soreness in my left back shoulder blade with nerve like funny bone pain/tingling shooting down my arm from time to time. I have had xrays and an MRI of my neck and spine and those are all pretty much normal. I do have full range of motion in my shoulder, however the nerve pain will become worse if a reach for something or use that arm in any way that taxes teh back shoulder blade. If anyone pushes or massages that muscle that runs on the edge of my shoulder blade my arm will start tingling immediatly. After my MRI due to lying on my back my shoulder blade and that muscle swelled up considerably. I was wondering if their was anything natural I could use that would help.