When a 6-month-old baby has a fever of 38.5°C, he or she needs to be treated quickly to reduce the fever, otherwise it is easy to have a febrile convulsion, which can produce irreversible damage to the child’s brain cells. You can use physical cooling methods, such as using warm water to wipe the child’s armpits, groin, neck and other places rich in blood vessels; you can also wipe other skin, the effect is good. If the child’s temperature does not drop or continues to rise after physical cooling, the child should be given fever-reducing medication quickly. You can take ibuprofen suspension or acetaminophen suspension, which can be repeated after an interval of 4-6 hours, no more than 4 times a day, and the specific dosage should be used according to the child’s weight and in accordance with the instructions.