A couple of days ago I developed this bump between my butt near the very top of the crack and it has progressively gotten bigger. It hurts incredibly bad whenever I sit or stand, or just walk too quickly. I looked up information about a pilonidal cyst and other things but it is not secreting at all and there is no head or tip that makes me believe it's a pimple. It's just a large red bump underneath the skin and I think it may be pealing now. It's very embarrassing and painful and I'd like to avoid the doctors office. Does anyone know what it might be?