Infantile roseola is a common febrile rash illness in infants, the main manifestation of which is high fever lasting for three to five days. When the fever subsides, a maculopapular rash appears on the skin. During the illness, it is important to ensure that the room is well-ventilated and to avoid taking the child to crowded places to prevent worsening of the condition due to cross-infection. Additionally, if the child has a high fever or feels unwell, appropriate fever-reducing treatments should be given. If physical cooling is not effective, suitable antipyretic medicine should be administered. Also, the child should not wear too many clothes or be covered with thick blankets during the fever to avoid impairing heat dissipation. If the child sweats a lot when the fever subsides, be sure to change their clothes promptly to prevent catching cold. During the illness, the child should drink plenty of water, preferably warm. As for diet, it is important to consume light and easily digestible food and properly supplement with vitamin C. If breastfeeding, the mother should be cautious not to consume spicy and greasy food since the baby's gastrointestinal tract is relatively weak during illness. If the mother's diet is too spicy or greasy, it could potentially exacerbate the baby's gastrointestinal burden, leading to diarrhea or vomiting.