The need for treatment of a rash after a high fever in a child needs to be analyzed according to the specific situation of the child. First of all, if a child has a rash after a high fever, the rash is very itchy and the child’s mental state is not good. This is often due to bacterial infection or viral infection combined with bacterial infection, etc. Symptoms should be promptly tested with blood tests or viral antibody tests. In addition, this is a condition that does not require treatment and is most commonly seen in children who have early childhood rash. Erysipelas is an acute rash caused by a viral infection that occurs most often around the age of one week. It causes a high fever that lasts for 3-4 days, and then the rash suddenly breaks out and the fever subsides. In this case, the rash is in good spirits and the feeding is normal, so there is no need for treatment.