The red rash after the baby fever, can be considered and toddler rash, chicken pox, scarlet fever and other diseases, should be promptly symptomatic treatment, if the infectious disease, pay attention to isolate the child. 1. Childhood emergency rash: mainly for symptomatic treatment, mild patients should pay attention to bed rest, timely supplementation of fluids and nutrition, and give antipyretic such as acetaminophen treatment when there is high fever. 2. Chickenpox: children with chickenpox need to be isolated in time, because the disease is self-limiting, mainly symptomatic treatment and antiviral treatment, antiviral drugs such as acyclovir can be used for treatment, symptomatic treatment can be antipyretic, antipruritic and so on, itchy skin can be used as topical glycerin lotion. 3. Scarlet fever: attention should be paid to isolate the child, and bed rest, due to its group A beta-hemolytic streptococcus caused by infectious diseases, antibiotics (preferred penicillin) treatment, if penicillin allergy can be selected erythromycin, clindamycin and other drugs. The baby fever after the rash, it is recommended to consult a doctor in a timely manner, a clear diagnosis, follow the doctor’s instructions standardized medication.