There is no optimal treatment for a child with a fever of 39.5 ℃, which can generally be dealt with through medication to lower the temperature, physical cooling, and treatment for the cause of the illness. 1. drug cooling: under the guidance of the doctor, take ibuprofen, acetaminophen and other medication, but also in the hospital through the antipyretic pessary way to give medicine. 2. Physical cooling: In addition to medication, you can also use physical cooling at the same time. Warm water bath is to use 32~34℃ water temperature to wipe the body, so as to achieve the effect of cooling. In addition, you can also reduce wearing, lower room temperature, ventilation, drinking more warm water and so on. 3. Treatment for the cause: children with a fever of 39.5 ℃ is a state of high fever, timely blood tests for children to see whether it is a bacterial infection or a viral infection. Bacterial infections take antibiotic treatment, such as amoxicillin granules, cefixime granules, viral infections can be mostly self-healing, if the influenza virus caused by the application of oseltamivir and other antiviral drugs. In addition, daily care should pay attention to changing the child’s sweaty clothes and ensuring sufficient sleep, which is conducive to the recovery of the disease. All of the above medications should be used under doctor’s supervision, avoid self-medication.