Recurrent fever in babies is due to the fact that their immune system is not fully developed and is susceptible to various sources of infections and diseases that can lead to recurrent fever. Most babies have recurrent fever due to bacterial, viral and mycoplasma infections, the most common of which are bacterial and viral infections that cause recurrent fever. You can do a routine blood test for your baby to quickly determine if the fever is caused by bacteria or viruses. Influenced by infectious diseases, recurrent fever in babies may be caused by some common infectious diseases such as measles, chicken pox, scarlet fever, tuberculosis infection, etc. Babies with low immunity are more likely to get infected with infectious diseases, resulting in recurrent fever. Some immune diseases can also cause recurrent fever in babies, such as rheumatic fever, rheumatoid fever, Kawasaki disease and other immune diseases. In addition to this, tumors can also lead to recurrent fever in babies, such as leukemia and lymphoma. If you find that your baby has recurrent fever symptoms, you should go to the hospital for a timely examination to find out the cause of your baby’s recurrent fever.