Childhood emergency rash is contagious, and if your baby has it, you need to pay attention to preventing cross contamination. Childhood emergency rash is generally caused by human herpes virus infection, in six months to eighteen months of infants and young children are more common, four seasons can be onset, has a certain degree of contagious, through the air droplet transmission is the main means of transmission. Early childhood emergency rash will generally cause high fever, fever for three to five days, after the fever out of the rash can gradually improve, during this period are contagious, until the rash subsides after the contagiousness will be reduced. It is recommended that babies should be treated positively after getting emergency rash, avoid going to crowded places, and follow the doctor’s instructions.