Baby’s body temperature 39 ℃ burn overnight will affect the normal cellular metabolism of the body, usually do not burn silly. Baby fever to 39 ℃, parents should promptly give the baby oral antipyretic drugs, such as ibuprofen suspension or acetaminophen suspension, the use of doses need to strictly follow the instructions. At the same time, the baby’s clothing can be properly undone, so that the baby is in a ventilated, cool and comfortable environment. If the baby has cold limbs and chills, soak hands and feet in warm water; if the baby has warm limbs and no chills, use ice bags or ice cubes to apply cold compresses to the baby’s head, neck, armpits and other parts of the body, and increase the baby’s water intake appropriately to avoid dehydration. In addition, parents should regularly monitor the baby’s temperature and observe whether there is cough, nasal congestion, runny nose, abdominal pain and other accompanying symptoms. If the baby’s temperature is always at 39℃, go to the hospital to check the blood count and C-reactive protein. If it is caused by viral infection, oral anti-viral oral solution can be taken; if it is caused by bacterial infection, drugs such as amoxicillin granules should be given for treatment.