Parents often bring their children to the hospital, responding to their children’s repeated fevers within a certain period of time, and each time the disease does not take long to reappear, it is very distressing, what is the reason for this, and how to deal with this situation, if it occurs? Children themselves are in the growth and development stage, including the immune system, are in a stage of gradual maturity and perfection, then, accordingly, susceptible to infectious diseases, common such as upper sensation, diarrhea, and even pneumonia, intracranial infections, etc., different diseases can be treated separately. Of course, we have to further differentiate the situation of recurrent fever, if it is an infectious disease, the child each time treatment is very smooth, oral medication can be recovered in the short term, or a short infusion quickly improve, often means that the child’s immune level is still okay, do not be too nervous, each time the treatment of disease at the same time, pay attention to the prevention of dehydration, observe changes in the condition, timely adjustment of treatment medication, after healing can be appropriate vaccination, reduce with Family members of patients with infectious diseases, including family members, go to less crowded places and try to ventilate the living environment more to reduce the chance of infectious diseases. If the child is difficult to treat each time, it takes a long time to get well, or each time the infectious disease is very serious, then you need to be alert to another problem, low immune level or deficiency may be, then try to improve the immune function related tests, to exclude this possibility. Then the cause of fever is not only infection, but also some immune-related diseases, such as rheumatism, rheumatoid, connective tissue disease, etc. In some cases, it is also necessary to be alert to the possibility of malignant diseases such as lymphoma, leukemia, solid tumors, etc. When the child has some signs of appearance, it is also necessary to perform timely bone penetration bone marrow cytology, bone marrow biopsy and other related tests to clarify the diagnosis and specific treatment. In fact, we often say that the occurrence of disease is important in prevention, prevention is much better than treatment, infectious diseases are inevitably experienced by children at a young age, parents do not need to be too nervous.