Childhood emergency rash is a viral infection that usually does not recur twice, but there is a very small chance that it will recur twice if the child’s physical condition is poor and resistance is weak. Childhood emergency rash is caused by human herpesvirus type 6, and symptoms may include high fever, convulsions, and swollen lymph nodes behind the ears. Typical rash is a small, red, dense maculopapular rash, which usually appears after 3-5 days of high fever and subsides the next day after the rash. After the rash subsides, the infant can obtain a longer lasting immunity and basically will not recur. A second recurrence may occur if the infant is relatively weak and prone to illness, or if immunity is reduced for other reasons. There is no special treatment for infantile acute rash, and it is mostly symptomatic. After the rash subsides, it will not cause skin peeling, etc. Parents should pay attention to protecting their infants in order to minimize the chances of contracting the virus.