I need your help badly. This is really disgusting and very very embarassing. While I was pregnant with my first child I developed a serious problem with my butt crack. It appears as one big stretch mark from top to bottom on both side of my butt cheeks. It has a dark brown exterior with a bluish red stretched and very uncomfortable skin beneath the brown area. I have Crohns disease, but was not diagnosed with it until after my 4th child. Like I said this starting happening during my first pregnancy. It's horrible. Is there anything I can do. When I go to the Dr.s for my checkup's, they never say a thing, but I know they see it.