A one-year-old baby with a fever of 38.5°C should, first of all, be given oral antipyretics such as acetaminophen and ibuprofen, which should always be available at home. Second, go to the hospital in time, ask the doctor to assist in finding the cause of the fever and treat for the cause. Then, reduce your baby’s clothing appropriately to keep your baby in a cool, comfortable environment. Give your baby more water as appropriate, as fever can easily lead to dehydration. If your baby has cold limbs with chills, give warm water to soak hands and feet. If the baby does not have cold limbs and chills, you can use a cold towel to apply cold compresses to the head, neck, armpits and other parts of the body. Finally, pay attention to the regularity of the baby’s fever and the accompanying symptoms, with or without cough, runny nose, abdominal pain, nausea, vomiting, nausea, joint pain, fatigue and so on.