Last night when I was laying in bed I was moving my mouth around and I noticed that it kind of hurt. So this morning when woke up and I went and looked at my lip and there's a red bump on my upper lip. It doesn't hurt if I don't touch it, only if I scrunch up my lips and if I press on it but it doesn't hurt enough to cause discomfort. It doesn't burn or itch. Is it a pimple, or a cold core, or possibly something else?
Update- it no longer hurts.