Hello, my daughter broke out in a rash on her vagina and bum yesterday and vomited today also. I am unsure if they are correlated, she is 9 months old and hasn't vomited in a long time. The rash doesn't look like typical nappy rash, its quite pimply and blistery. She seems well in herself other than the one bout of vomitting. Any thoughts? She is allergic to cows milk and she had egg yesterday so I wonder could it be an allergic reaction.