My two and half year old had an awful reaction on his upper inner thighs after pooing in a swim nappy. His skin went red raw and after that calmed down you could see what looked like bruising...We think it may have been a reaction to the chlorine, although sometimes he does have very runny and strange (and smelly!) number 2s and they can cause the same reaction. We are having some tests done now, but I'm curious to know if anyone else has seen this on their children? Thanks, Vicky