When a 7-year-old baby has a fever of 39 degrees, the child needs to be treated immediately to reduce the fever, otherwise he is prone to febrile convulsions. You can take ibuprofen suspension orally, the specific dosage needs to be based on weight and used according to the instructions. It is best to combine physical cooling, using warm water to wipe the child’s skin all over the body, especially in the armpits, groin, neck and other places rich in large blood vessels, to help reduce fever. You need to pay attention to indoor ventilation and change the sweaty and wet clothes in time to prevent your baby from catching cold for the second time. It is best to take your child to the hospital for a routine blood test to see if there is an increase in white blood cells. If there is an increase in white blood cells, it indicates a bacterial infection and you need to take cefixime or azithromycin. If there is no elevation of white blood cells, most of the cases are viral infections, you need to give your child cold and fever granules and four seasons antiviral combination.