Pediatric emergency rash is generally called toddler’s emergency rash, after the rash comes out with fever, part of it is a normal change in the condition, part of it is considered to have other comorbidities. The fever is usually three days, the highest temperature can be more than 39.5 ℃, three days after the heat out of the rash, after the rash is no longer fever, the rash is usually a small rose spots, 3 ~ 5 days by itself, the condition of the natural recovery. During the period of rash, some improper care, such as poor air circulation, clothing and blankets wrapped too thick and other undesirable factors, may also cause a small number of babies have a slight fever, the body temperature does not exceed 38 ℃, without any other discomfort, usually can be observed for 12 to 24 hours, can naturally subside, then do not need special treatment. If the fever is still recurring and the temperature is more than 38℃ after the rash has come out, it is considered that there may be a combination of other viral or bacterial infections. Some patients with obvious cough and sputum symptoms need to be further examined for complications such as bronchitis and pneumonia. In the case of repeated fever after the rash, it is recommended to identify the cause of the disease by combining the magnitude of the fever and the accompanying symptoms, and it is recommended to go to the hospital for further examination after repeated high fevers, and to standardize the treatment in time after a clear diagnosis, so as to avoid a delay in the condition.