I have a lump under my skin, around the size of a quarter, maybe a bit bigger. I can move it around with my finger, but it's painless. It's been there for about a month, since I wanted to give it time to see if it would go away by itself, but now I'm starting to worry. I've had bumps under my skin before, on the back of my neck, those were usually painful and I've gotten quite a few tests from the doctors before for the painful bumps, and they turned out to be nothing. But I haven't had any lumps in quite some time, and suddenly getting this huge painless one worries me a lot. I can see it under the skin, especially when I turn my head to the side, so it's not too deep in there. Anyone knows what it might be? I'm super worried.