I have a small mole on my forehead, about the size of a sesame seed, that has been there since I was born. I am 14 now, and it's never done anything weird. Yesterday I found that it was tender to touch and was pink around it, similar to a pimple. It wouldn't be weird for it to be a pimple, considering I have normal break outs like every other teenager, but is this a pimple underneath the mole or something worse?