How does the baby of 4 months have a fever 38 degrees to do

Family members can put antipyretic stickers on the baby's forehead for physical cooling, or place ice packs on the baby's neck, armpit, groin and other parts where large blood vessels pass through to cool down. Family members also need to use a thermometer to monitor the baby's temperature; if the baby's temperature exceeds 38.5℃, drugs are needed to cool down.