I always had exactly the same problem with Edie's bum. It would be red raw and like an open wound. I have had various creams for it, wipes have always been a no, as have cheap nappies (though we got on ok with lidl ones). Sudocrem was always too harsh. I had to stick to pampers, cotton wool and water, prescription cream and epaderm when it was bad, very mild nappy cream when it was ok (the Tesco one was good) and sometimes her poo would make it bad especially when she was teething. Poor Noah its horrible. Louis doesn't seem to suffer but Edie had it right up until she was out of nappies a few months ago.