Hi! I have a sore on the skin just under my bottom lip that's bothering me. I don't think it's a cold sore - it didn't feel numb or tingly before popping up. (My fiance does get them. He had one the last time we saw each other, but didn't kiss.) It just hurt like a painful pimple coming in and had a whitehead like one too. It's been about a week and the whitehead has gone away, but the spot is still red and swollen. It throbs occasionally, otherwise has not gotten any better or worse.