Hello! I have this weird sort of whitish-yellowish bump on my foreskin. It dissappears completely when I'm flaccid and my foreskin is pulled up. If I pull it halfway down it's the most visible. I took a picture of it and added it to this post. It's painless and I've had it for as long as I can remember. My question is, is it just a cyst or could it be something more dangerous? I'm 19 years old and haven't had sex so it can't be a STD.