If an 8-month-old child has a fever of 39°C, the following methods can be used to treat the fever: 1. Take medication to reduce the temperature in time to improve the symptoms, such as acetaminophen suspension, ibuprofen granules or ibuprofen suspension. 2. Feed the child more warm water, which can play a role in physical cooling and help relieve the symptoms of fever. If the child’s body temperature does not drop, you can use warm water to wipe the body to assist in cooling. If the child’s temperature does not go down, the child should be sent to the hospital in time for examination and treatment. Especially if the child has fever, poor mental health, depression, or drowsiness, the child must be taken to the hospital in time.