Children with a fever of 38.9 degrees need to use ibuprofen and other drugs to reasonably reduce fever, and actively identify the causes of fever and treatment, such as viral infections caused by fever, if necessary, can be taken orally to fight the disease oral solution treatment. When a child has a fever of 38.9 degrees need to follow the doctor’s instructions to use drugs to reduce fever, such as the use of ibuprofen or acetaminophen, etc. to reduce heat treatment, in order to prevent the cause of febrile convulsions, etc., at the same time dynamic monitoring of the body temperature, with the use of lukewarm water baths, etc., as appropriate, to carry out physical cooling, and to pay attention to avoid alcohol and other wipes. Define the cause of fever is also the focus of treatment, such as viral infections caused by fever, can follow the doctor’s prescription oral antiviral combination of four seasons treatment, secondary bacterial infections need to use antibacterial drugs, such as cefaclor, etc., to carry out anti-infective treatment. Children diagnosed with influenza should be treated with oseltamivir phosphate. Children with a fever of 38.9 degrees, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.