A 12-year-old child with a fever of 38.9 degrees, may be related to colds, bronchitis and other diseases, can be given antipyretic drugs to lower the temperature, while with the general therapy, physical therapy and so on. 1. medication: 12-year-old children with a fever of 38.9 degrees, need to be given timely medication to lower the temperature, to avoid fever convulsions, such as ibuprofen, acetaminophen and other medications can be used as prescribed by the doctor for antipyretic treatment. 2. General treatment: medication at the same time, the need to let the child rest, hydration, speed up the metabolism, to help reduce fever, while preventing dehydration. 3. Physical therapy: can be placed on the child’s forehead fever stickers, warm water bath to achieve the purpose of cooling, assist in reducing fever. In addition, if the fever of a 12-year-old child is high or lasts for a long time, it is recommended to consult a doctor in time to determine the cause of the fever, and treat according to the diagnosis and guidance of professional doctors.