The rash in toddlers tends to subside in 1 to 2 days after the rash breaks out. Childhood emergency rash is a kind of rash infectious disease, which is caused by viral infection. The incubation period of this disease is 10 days on average, manifested by sudden high fever, body temperature can be as high as 39.0℃~40℃, fever is repeated, generally the fever period can last for 3~5 days, and then the body temperature returns to normal, the fever subsides and the rash comes out. The rash can come out within 1 day, and the rash usually subsides after 1~2 days without scarring or pigmentation. In general, there is no special treatment for infantile emergency rash, and fever is mainly treated with symptomatic treatment such as fever reduction. Specific need to be under the guidance of the doctor treatment.