Exanthema subitum, also known as roseola infantum, is a common pediatric disease caused by a viral infection that results in fever and rash. When a child's temperature exceeds 38.5℃, it is necessary to administer antipyretic medication. If the temperature is below 38.5℃, physical methods to reduce the fever are sufficient.

Since the child is in a continuous state of high fever, it is acceptable to use air conditioning. Air conditioning can maintain a suitable indoor temperature and humidity level. The appropriate temperature and humidity can make the child more comfortable and also aid in reducing the fever. Of course, it is crucial to avoid exposing the child directly to the airflow from the air conditioner. Additionally, the air in air-conditioned rooms can be quite dry, so it is essential to ensure that the child drinks plenty of fluids.