Hey im a teen. I dont know what it is exactly but i have a tan circular mark on the shaft of my penis. It might be raised a little. Its not bumpy or anything. Those are the only symptoms. Ive had it for about 5 months and it hasnt really chainged at all. Im not sure if its an std. I havent had intercourse or anything. About a month after i got this on my penis i got ringworm on my leg. Maybe the circle on my penis is ringworm but they dont look anything alike. I need answers asap. THANKS