question: hello I have had a small dime size lump on my head obviously under my scalp on an estimational guess 7-8 years. its on the right side up on top. it doesn t hurt in fact it can be moved around. its hard to a certain extent. I know about 7 to 8 years ago I picked at a scab there and kept picking at it til it was crater size I was wondering if by chance it could be hard scar tissue or possible calcium deposit of some sort. any advice would be great thank u.