I have had an itchy butt crack for roughly two years now. It s been off and on, but it feels like my buttcrack is sweating and when it gets wet it gets really itchy. Which leads to me scratching, I try not to, but sometimes it gets so bad that I have to scratch. When I do scratch, I end up making the skin rough and raw, which hurts. How do I get rid of the sweating/itching?