When you have a high fever, on the one hand, you should pay attention to drink more water appropriately, which can increase the amount of blood circulation, increase the amount of urine, and promote the discharge of toxins in the body. On the other hand, you should pay attention to physical cooling, you can use hot towels or alcohol to wipe the armpits, groin and forehead, or take a hot bath directly to achieve the purpose of physical cooling. In addition, in times of high fever, because the body temperature has reached 39 degrees, you can choose medication to lower the temperature. Commonly used antipyretic drugs include aspirin, paracetamol, compound zinc cloth granules, ibuprofen tablets, etc. It is important to keep measuring the temperature at this time, and if the high fever persists, you can consider using hormonal cooling, commonly used drugs such as methylprednisolone or dexamethasone.