Hi. I'm 15 and I never had sex. I am an active masturbator, probably a couple times and week. I've been doing this for a year or two so nothingness ally came up. Recently, after the shower, I realized small red patches on my penis head. They aren't bothering much, but they are sensitive to touch. I read that if you masturbate incorrectly, this can happens. What is this and what can I do to get rid of this?