Toddler’s emergency rash with fever and rash at the same time may be a manifestation of rash when the body temperature is about to normalize. Early childhood emergency rash, also known as infant roseola, belongs to the acute rash fever, infected with human herpesvirus type 6 children can suddenly fever, in a few hours, the body temperature can rise to 39 ~ 40 ℃, in the heat lasts 2 ~ 5 days after the sudden drop, at this time, the body temperature is about to return to normal or after the normal, the rapid appearance of rose-colored maculopapular rash, and then after 1 ~ 2 days to subside, non-desquamated and no pigmentation remains. After the occurrence of toddler emergency rash, children to the hospital specialists in a timely manner, symptomatic treatment, active fever, to prevent the occurrence of febrile convulsions, pay attention to bed rest, and active rehydration. There may be other reasons for the rash while having a fever, so it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.