I have a small spot at the top of my butt Crack that comes and goes every few months. It isn t warm and doesn t drain. It comes gets really red, feels bumpy, itches, is sore, then goes away. When it goes away it leaves a scaley/scab like thing in its place that falls off and it comes back in a few months. It has never drained, no blisters, and no white head. Please help!