A year ago, my 2 1/2 year old stuck a pencil tip in her chin. The wound bled a little, so we did not see anything in it. When it healed, we noticed that a tiny piece of lead must be in there, as it looks like a black freckle under her skin. The skin is smooth, just discolored. Should I try to get it out? We were hoping it would "grow" out, but so far it has not. What should I do about it?