Babies with a fever of 38.5 degrees should be given oral antipyretic medication immediately, such as ibuprofen and acetaminophen, and at the same time reduce the baby’s clothing appropriately, so that the baby is in a cool, comfortable environment, and drink plenty of fluids appropriately, because fever tends to make the baby dehydrated. Physical cooling mainly includes placing cold towels on the baby’s head, neck, and armpits to apply cold compresses, and soaking the hands and feet in warm water if the hands and feet are cold. Actively prepare for hospitalization and ask the doctor to assist in finding the cause of the fever and treating the cause. Parents should carefully record the pattern of fever, the highest degree of fever, and the presence of accompanying symptoms, such as runny nose, cough, sneezing, anorexia, malaise, inactivity, abdominal pain, and the presence of rashes and joint pains on the body.