So, for about a year now, I've been acutely aware, although not really bothered about this reddish/pinkish leathery patch on the underside of my penis with a line leading up to the head. I was originally expecting it to go away over time, but a year in, its still not gone, although it doesn't seem to come with any symptoms, it's just kind of there. Is this serious, or shall I just leave it be?