Not all babies get E.R., but only when they are infected by the virus that causes E.R. The rash is usually caused by herpes virus type 6 infection, mainly seen in infants and young children, the general condition of the child, fever, some children will appear febrile convulsions, behind the ear, the occipital lymph nodes can be swollen, often accompanied by mild vomiting, diarrhea and other digestive symptoms, generally fever 3-5 days after the fever subsides rash, the rash is red, small, dense papules, in the head, face, neck and trunk area is more common, the limbs are less common. The rash is usually complete one day and begins to subside the next day. If your child has an emergency rash, it is advisable to stay away from public places for a while to avoid spreading the virus to other children.