Well the zit like bump is at the bottom of my penis far away from the head and it's on top. At first it started like a small dark bump and I've had it for a while now, but just today I got out of the shower and noticed that it's becoming bigger and now forming pus I think. I have never had sex in my life so I'm worried if I some how got a disease anyway. Is it possible to get a sort of big zit on your penis? Or is this a disease? I just really want to know because I'm afraid of something horrible happening to it. I'm 16 and active a lot so I'm usually always sweating, so maybe that could be a problem too? Please help, thank you.