I have a lump deep in the skin of my right shoulder blade. It started out as the size of a pea a few years ago and didnt bother me. Last month, it grew larger and became red and inflamed as well as hot and tender to the touch. I put hot compresses which made it go down, but it looks to now be bruised for the last few weeks and is throbbing on and off and I believe causing shooting back pains in the area. I was told by a P.A. that it is a cyst, that they wouldn't cut it open because it could risk infection. It is tender to the touch and I am worried.