I have recently notices that there is a very small lump under my foreskin. It is under the part of my foreskin that covers my penis, it is around the size of a large pimple. It doesn't really hurt or anything, but I don't think it has been there for a very long time. I doubt it has anything to do with sexual intercourse because I haven't had sex in a while and I'm fairly sure this lump is new.