Thanks for your great suggestions ladies. The doc told me to use the Daktozin cream and to do heaps of nappy free time which we do anyway. The reddness is getting better, at least he's letting me near his bum again. She said is was probably from an acidic poo which would make sense, as we always change his nappy a gazillion times a day, it never gets a chance to get really wet. I hope the cream will improve the reddness quickly.