Childhood rash illness is a common pediatric acute fever caused by herpes simplex virus types 6 and 7, characterized by a high fever lasting three to four days, followed by the appearance of a rash after the fever subsides. The treatment mainly involves symptomatic management. When a child's body temperature exceeds 38.5°C, antipyretic medications such as acetaminophen and ibuprofen suspension can be administered. It is also important to ensure the child stays well-hydrated. Before the rash appears, it is not certain that it will occur. For most children who have been confirmed through a blood test to have a viral infection, antiviral medications might sometimes be administered. However, these medications ultimately do not shorten the duration of the illness. Once the child has been feverish for three days and the rash appears, no further medication is typically necessary; just ensure the child drinks plenty of fluids. The rash usually spreads within about two days and then quickly fades. (Please administer medication under the guidance of a professional physician.)