question: My almost 9 month old has a rash/hives around the edges of her diaper, armpits, belly and backs of her legs. We just started introducing solid foods. We introduced oatmeal yesterday. She had a virus a week ago. No fever, just vomiting for about 8 hours. She s had a bit of loose stool this week. is this a food allergy or a continuation of whatever she had last week?