My 5 year old has been complaining for a few days now that a tiny white bump on the heel (not the part you walk on, the back of her foot) has been hurting her. The bump is tiny and white, looks like there would be puss in it but, I used nail clippers to clip down the skin to try and get to it. Nothing and it still hurts her. There are two other tiny bumps just below you can barely see. They're much deeper and not white. Any ideas?