Dd has had really bad nappy rash on and off for weeks. It seems to clear up, and then comes back with a vengeance (ie sore weepy spots appear just like that) from one nappy change to the next. The latest bout appeared during the day, and she had had that nappy for just over an hour. It seems to be her poo that triggers it, but not all the time. Has anyone else encountered this? I am introducing her to puree, but there doesn't seem to be any one food I can identify that causes the problem. She is on special formula because of milk intolerance.