I have this small bump on my lower lip, however I tested negative for oral herpes. It doesn't look like a blister AT ALL, there's no pain (well except if I bite it). No burning, tingling, itching nothing! It's ON the lip and its the SAME Color as my lip, I don't see any redness around it. I was fishing at the beach from 12-10 yesterday could it be from the sun? Could it be that I bite my lips often?