3-year-old child recurrent fever for half a month need to go to the hospital in time for examination and treatment, need to clarify the cause of targeted treatment, such as bacterial infections should be used cephalosporin antibiotics. 1. Infectious diseases (1) bacterial infection: 3-year-old child recurrent fever half a month if because of bacterial infection, you can use cefixime and other antibiotics for treatment. (2) viral infections: need to target the use of antiviral drugs for children, such as the use of oseltamivir to treat the influenza virus, the use of acyclovir to treat the herpes virus, etc., general viral infections can be supportive treatment. 2. Non-infectious diseases: rheumatoid immune diseases or blood system diseases may cause corresponding symptoms in children, need to identify the type of disease and then follow the doctor’s instructions for targeted treatment, including immunosuppressants, glucocorticoid drugs. A 3-year-old child with recurrent fever for half a month needs to consult a doctor for a clear diagnosis and targeted treatment. The above drugs should be used according to the doctor’s instructions.