A fever of 39.5°C in a 1-year-old child is a high fever condition. High fever is mostly caused by infectious factors, related to the invasion of pathogenic bacteria such as bacteria, virus or chlamydia. You can give medicines such as ibuprofen suspension, compound zinc cloth granules, cefprozil dry suspension and azithromycin granules to reduce fever and anti-infection treatment. Drinking hot boiled water or ginger brown sugar water during the illness can increase sweating and help reduce fever. In addition, you can also put Bing Bing fever patches on your forehead to help physically cool the fever. If the fever persists and does not drop, there is a high risk of febrile convulsions, so be sure to watch closely to see if your child has symptoms such as drowsiness, twitching of the limbs and foaming at the mouth. Once this type of situation occurs, go to the hospital in time to avoid leaving more serious sequelae. Be careful not to put too much clothing on your child during the illness so as not to affect heat dissipation.