Hi, My DS is 9 months old and up until about 3 weeks ago had never had any sort of nappy rash or sore bottom. But he's now had a very red (as if he'd sat in a really hot bath) bottom followed by very sore patches, lasting for about a week. I wonder if he could be allergic to either wheat or marmite as from memory I seem to remember him having these as new foods around the same time. Does anyone have any ideas? I'm at my wits end as he cries whenever I have to wipe his bottom and the HV said its probably just teething but he def. isn't teething. Haven't changed nappy brands or wipes or anything else I can think of.