Recurrent fever in children may be due to infectious, non-infectious and other causes. 1. Infectious fever: infection is the most common cause of fever, including viruses, bacteria, tuberculosis, fungi, parasites, etc. According to the child’s symptoms, we should look for pathogens, make a clear diagnosis, and provide targeted treatment, and if we don’t find the pathogens, the fever will be repeated. Such as mumps, purulent tonsillitis, bronchitis, respiratory viral infections and other diseases. 2. Non-infectious fever: children’s recurrent fever can also be caused by tumors, leukemia, connective tissue and other diseases, need to be combined with the symptoms and related tests to clarify the diagnosis. Children with recurring fever may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.