Exanthema subitum in children is caused by a viral infection, generally starting abruptly with a fever above 39°C, and a rash appears as the fever subsides. The rash is roseola. During the period of exanthema subitum, it's important to avoid drafts, ensure indoor ventilation twice a day, and keep the air fresh. Since exanthema subitum is caused by a viral infection, it is necessary to treat children with antiviral medications. It is recommended to use traditional Chinese medicine antivirals because they tend to have fewer side effects. During the exanthema subitum period, avoid going out, and children should not attend kindergarten to steer clear of crowded places.