Hi, I've got this sore on my bottom lip that's been there for years now. It has never gone away. It's slightly darker than the rest of my bottom lip. It leeks out clear stick fluids at random times everyday. The sore is flat and not vert visible but when I put something on my lips like mentholatum, chapstick, or lip gloss the sore raises up, is more visible, and fluid comes out of it even more than usual. The sore doesn't hurt when I touch it or when I'm not touching it, but when I bite it, it does. When I press on the sore with my tongue, I feel something round. I don't usually put anything on my lip because the sore becomes visible. My lips sometimes tingles when I put something on it. I am not a sexually active person.