An eight-year-old child with a fever of 38.5 degrees is usually due to the common cold, and the cause should be identified first. If it is a viral infection, it can usually be self-healing and does not require special medication; if it is combined with a bacterial infection, antibiotics such as amoxicillin are needed. For fever, physical cooling can be taken, and antipyretics such as ibuprofen can also be used. 1. For the cause of the treatment: if the viral infection, usually can be self-cured, do not need special medication; if the bacterial infection, need to be under the guidance of the doctor, take amoxicillin and other antibiotics; 2. Physical cooling: If the child has a fever of 38.5 degrees, but the symptoms are mild and the mental state is good, you can lower the temperature through physical cooling, such as taking a warm bath, lowering the room temperature, drinking more water to promote sweating, etc., which will have a certain effect on the decline of body temperature. 3. Medication: If your child has a fever of 38.5 degrees and is uncomfortable, with severe symptoms and poor mental state, you can use antipyretic drugs such as ibuprofen or acetaminophen. Eight-year-old child has a fever, it is recommended to go to the hospital first, through the doctor’s examination, to take the appropriate treatment to avoid delaying the child’s condition.