Children with fever and rash need to be alerted to the early childhood emergency rash or scarlet fever and other diseases, specific need to be analyzed according to the child’s situation. 1. Childhood emergency rash: the disease is common in infants and young children, caused by human herpesvirus infection, the course of the disease manifested as fever, part of the lymph node enlargement, often mental reaction can be, usually in the fever 3~5 days, the appearance of a rash, the temperature is normal, the rash is usually manifested as a small dense red maculopapular rash. 2. Scarlet fever: the disease is caused by type B hemolytic streptococcal infection, clinical fever, rash, mostly in fever 1~2 days, the rash is generally higher temperature, the rash is often manifested as dense pinpoint-sized papules, diffuse congestion. 3. other: such as febrile diseases combined with drug rash, may also appear child fever and rash, drug rash rash is more diverse flowers, can be manifested as maculopapular rash, herpes and so on. Children with fever and rash may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.