Itching...

I don't mean to be gross or anything but I don't know where else I could ask this.... Every once in a blue moon I randomly get an itch "down there". All I can do is scratch. But I never understand why it happens. I took another shower and cleaned myself down there like I always do and felt fine at first. But then the itching came back... I looked down there and it looked reddish. I read online that I could possibly have a cut down there but I don't know. Has anyone had this problem?