A week or so ago I started developing an itch on the tip of my penis, on what seemed the inside of my urethra . The itch has slowly been expanding closer and closer to the base of my penis. The only way to relieve the itch, is to grind my pointer finger and thumb together on my penis, where the itch is. Now, today, I started to notice a very slight itch it seemed like a little tiny bit into my anus, though I am heterosexual and have a good hygiene and wash thoroughly. I started scratching it and now it has become extremely itchy, like a constant itch. Feels like little tiny bugs almost crawling in there. I really need some help. I have no idea what this is, how to treat it, whether to be worried or not, and etc.