A fever of 39+ degrees in a 2 year old 8 month old baby is usually recommended to bring down the temperature quickly through methods such as physical and medication. It is also important to treat the cause of the fever. For 2 year olds and 8 month olds with a fever of 39 degrees, fever-reducing medications such as ibuprofen and acetaminophen are usually prescribed under medical supervision. At the same time, use warm water to apply external compresses to the child’s forehead, reduce the clothing worn, etc., and encourage the child to drink more water and other methods of physical cooling. In addition, parents should take their children to the doctor for treatment of the cause of the disease, such as respiratory tract infections caused by bacterial infections, need to actively use antibacterial drugs such as cefaclor, cefuroxime and other anti-infective treatment. In case of rheumatic immune diseases, immunosuppressants are needed; in case of hematological tumor-related diseases, chemotherapy, bone marrow transplantation and other treatments are needed. All of the above drugs should be used under the guidance of a doctor, avoid self-medication. There are many other causes of fever in children, and it is recommended to consult a specialist for evaluation and treatment.