Hi, On the tip of my uncircumcised penis, on the skin part there is a bumb which doesn't hurt at all but if I squeeze it liquid puss comes out that is sticky. I have a line running down my penis, almost like a scar but that line passes though the bumb. I have had it all my life and has not caused my any trouble. I am 14 by the way. Maybe it has something to do with puberty?