After reading several posts, I am here to say I have a similar yet so different type of problem. The similarities are that it started in my butt crack, however, it involves the surrounding skin and it's the skin that is so painful. It feels like the cheeks don't separate when I sit down and that I am actually sitting on the tissue ( folds) at the coccyx area. This leads to skin breakdowns and has bleed at times. I have tried using large bandaids to try and keep the crack open but that doesn't work. I have tried other things to try to open that area when I sit but nothing has worked.. The only thing that gives me any relief is sitting on a donut shaped pillow but that relief is short lived because it starts hurting my buttocks. I am having to sit on one cheek or lay on my side when in bed. I am hoping that I can find something that will help this but I am also very concerned that with age that area will produce a decubiti and will be very hard to heal. I am 71 years old now and still active but there will come a time when that will change. hopefully not for a long time but still I have to be realistic. Has anyone ever experienced anything like this and if so I am open for suggestions. thank you