Baby persistent high fever may be herpes pharyngitis, pneumonia, encephalitis, etc., need to be treated according to the specific cause of the treatment, treatment methods include general treatment, drug therapy treatment. 1. herpes pharyngitis: may cause the baby high fever, need to consult a doctor in time, follow the doctor’s instructions to use antipyretic medication to reduce fever treatment, such as ibuprofen, acetaminophen and so on. At the same time need to do a good job of isolation, to avoid cross-infection. 2. Pneumonia: except symptomatic antipyretic treatment, viral pneumonia, if necessary, the use of antiviral drugs, such as ribavirin; bacterial pneumonia can choose sensitive antibiotic drugs, such as amoxicillin clavulanate potassium; mycoplasma pneumonia can choose macrolide antibiotics, such as azithromycin and so on. 3. encephalitis: for viral infections caused by the need to use antiviral drugs, such as acyclovir, etc.; and bacterial encephalitis need to choose sensitive antibiotic drugs, such as ceftriaxone, and encephalitis often need intravenous infusion treatment. There may be other reasons for your baby’s persistent high fever, so it is recommended that you go to the hospital in time for a complete examination to determine the cause of the illness and then give targeted treatment or therapy. The above drugs should be used under the guidance of a doctor.