I've been using Pampers for my son for 15 months now and have never had any problems. But after using a nappy from a new Pampers Baby Dry 4+ pack within hours he had a horrible, blistery, weeping rash . "Rash" is not even the right word, it looks more like a burn all over his bottom and at the top of one of his legs. He is in severe pain, screaming every time we have to change his nappy. We've a doctors appointment this evening but I just wondered if anyone else has experienced something similar ?