I am well aware that people come to these forums with issues much bigger than this, but it has me concerned and I feel a little awkward talking to other people about this (in person).
I am 17 years old, and have not had sex, or anything near it. I am very physically active, soccer 3-4 times a week, while running nearly every day. I have recently noticed a small area on my penis that is dark brown. I assume it to be a bruise, perhaps from some trama sustained during sports. Once again, I have not had sex so I am relatively certain it is not an STD. It has been there about a week or so, and it is just over 3/4 inch in diameter.
Just wondering if I should start to worry, or if it is commonplace.