Hi Jalrein,When I had my colostomy (I now have an ileostomy) it started to prolapse a very little, maybe half an inch or so several months in. It wasn't a particular problem, and it would usually be in it's retracted state, only prolapsing a couple times a day. Then, suddenly one day it prolapsed a huge amount, I'd say five to six inches. It basically filled my pouch. My output stopped completely and I was in a lot of pain. I was terrified. It took a visit to the ER and two separate attempts to get it back in while under anesthetic. I was already on a waitlist for my ileostomy surgery (for other reasons), so that got bumped up. My ileo has never prolapsed, but I also don't know why it happened with my colostomy either. Sorry, I don't imagine this helps, just my experience. My ostomy nurse and the surgeon both had no real explanation for why my stoma prolapsed, just that it "sometimes happens".
Terry