As toddler emergency rash is contagious, it is recommended that babies with toddler emergency rash should not go out for the time being, especially not to crowded public places, so as to avoid spreading the virus to other babies. Childhood emergency rash is caused by herpes virus infection, mainly in infants and young children, babies are generally in good condition, will appear behind the ear, post-occipital lymph node swelling, often accompanied by mild vomiting, diarrhea and other digestive system symptoms. Individual babies with fever will be accompanied by febrile convulsions, and usually have fever for 3-5 days, and then the fever subsides and the rash comes out. After the rash comes out, the baby’s illness is basically over. The rash is characterized by red, dense maculopapular rash, which is more common on the baby’s head, face, neck and trunk, and less common on the limbs.