Baby a few days repeated fever may be influenza, pediatric pneumonia and other causes. 1. Influenza: Influenza may be caused by influenza A virus or influenza B virus infection, the patient will have a persistent high fever for more than 3 days, cough and phlegm, chest pain, runny nose and other manifestations, so the baby will appear for a few days of recurring fever manifestations. 2. Pediatric Pneumonia: Pediatric pneumonia may be caused by viral, bacterial, mycoplasma, chlamydia and other pathogenic infections. Patients will show persistent fever with cough for 3~5 days, wheezing, drowsiness, dyspnea, etc., so the baby will have a few days of recurrent fever symptoms. 3. Other: baby a few days repeated fever may also be pyelonephritis, leukemia and other diseases caused by the need to improve the urine routine, blood routine and other related tests to assist in the diagnosis. It is recommended that babies with recurring fever for a few days need to consult a doctor in time, the doctor will be clear after the cause of the disease to choose targeted measures for treatment.