Eight months of the baby leprosy fever to 39 degrees, may be the adverse reaction of the vaccine, but may also be bacterial infection caused by acute tonsillitis, etc., it is recommended to consult a doctor in a timely manner, to clarify the cause of fever, the use of antipyretic drugs, antibacterial drugs under the guidance of the doctor, and other treatments. 1. Vaccine reaction: eight months of the baby leprosy fever to 39 degrees, may be the adverse reaction of the vaccine caused, you can follow the doctor’s instructions to the baby to take ibuprofen suspension, acetaminophen granules and other medications for antipyretic treatment, at the same time with the physical cooling and so on. And timely monitoring of body temperature, observe the baby’s state. 2. Bacterial infection caused by acute tonsillitis: in addition to symptomatic medication to reduce fever, but also need to follow the doctor’s instructions in time to give the baby to take cefixime, amoxicillin and other drugs for anti-infection treatment. Eight months of the baby leprosy fever to 39 degrees may also have other reasons, it is recommended to timely go to the hospital, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.