DD is 8 months old and has really bad nappy rash - possibly teething or having a cold? But she has never really had it this badly before and she has it for over two weeks. It sort of clears up and then comes back. We have switched her from real nappies to disaposible, use nappy cream. She is at nursery most days, but they say they change her regulalary (?). Any himts, suggstions or tips or do I just have to sit it out?