it started as a small white spot about 5 months ago and since then it has been increasing in size. now it is about 2cm in length,itches sometimes, started getting a really bad itchy scrotum about a month ago. i am sexually active. i get a rash around my scrotum sometimes. i play sometimes. sometimes i feel like it burns sometimes when i pee. i was wondering if i have an std or a yeast infection or something?