Hello, I am twelve years old, and I have this bump on my foot, near the right side of my heel,(right foot) it hurts when I maneuver it in certain positions with my shoes on in school, and when I wear my crocs at my house and have my feet planted down on the ground on my couch, I wish I could show you a picture, but it used to just be a bump on my foot, now the bump has turned into a crater kind of, and it's yellow on the inside of the crater with an unremovable black speck, I'd be grateful to know this might be or how to fix it.
-Nathan Jones