Baby fever 39.5 ℃, if the fever does not go away for a long time, it may cause some impact on the brain cells, especially when it causes convulsions and seizures, it is possible to burn the brain. Compared with adults, the baby’s central nervous system development is not yet complete, fever 39.5 ℃ already belongs to the high fever, sustained high fever may trigger convulsions and seizures, etc., will produce brain damage. So at this time you need to take appropriate measures to lower the temperature to prevent convulsions, you can use the head of the antipyretic patch, warm towel bath and other physical methods to lower the temperature, and at the same time need to take antipyretic drugs such as ibuprofen and other ways to lower the temperature. If the child has fever symptoms, we must promptly consult a doctor to take appropriate measures to lower the temperature and identify the cause of the disease in time for targeted treatment, otherwise it may cause irreversible brain damage.