Recurrent pneumonia in babies may be caused by low immunity, incomplete treatment, incorrect treatment and so on. 1. Low immunity: If the baby’s immunity is relatively poor, it is easy to be attacked by pathogens again after the pneumonia is cured, which will lead to the baby being infected with pneumonia again, and then the patient will have recurrent pneumonia. 2. Incomplete treatment: the baby did not follow the doctor’s instructions to fully use the medication after the emergence of pneumonia, or intermittent use of medication, which may lead to incomplete treatment, easy to make the recurrence of pneumonia. 3. Incorrect treatment: the baby did not check the cause of the pneumonia, did not choose the targeted drug treatment, for example, the baby appeared bacterial pneumonia, but gave the baby with antiviral drugs, which may not achieve the therapeutic effect, easy to make the baby recurrent pneumonia. There may be other reasons for recurrent pneumonia in babies, so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.