I had a bump on my chin for about 8 months. It had been growing with no color, just a small bump (about a third size of a mint) Naturally I started messing with it and dug into it until I had ripped up my skin. I was able to squeeze it and clear fluid comes out. Then about 3 months later it has come back. it has a rough surface now. is this a cyst? What do I do to get rid of it?