my rectum - between vagina and anal, is puffy and real itchy. it became puffy after i had been scratching it, and it doesnt seem to go away. I had anal sex for the first time with a guy with out a condom and I'm thinking that could be the reason, but the itchiness didn't start to happen until months later..could it be some other cause? why is this ? and what is this? is there treatment?