Hi thanks for writing to Practo.  Diapers which are changed regularly won't cause cold as such, I am referring to commercial diapers and not cloth diapers. Your next query is not confusing... milk ejected from where? I suppose you are referring to vomitted milk. If babies weight is ok and baby is happy even after vomiting then don't worry much. Still it's more apt to have one to one discussion about case.