The causes of recurrent fever in children, many of which are based on disease, can generally be considered the following: 1, children’s immune system is low, vulnerable to bacterial or and viral infections, it is easy to cause their own disease, and in serious cases will cause the symptoms of high fever; 2, children’s nervous system is not yet developed immature, even when the child fever when taking antipyretic drugs after the fever subsides, but due to the imperfect function of the thermoregulatory center This symptom may also be due to the child’s weak body or congenital immune deficiency, the child will have repeated respiratory infections, or non-infectious connective tissue diseases, for this type of disease must take the child to the hospital for examination, to avoid the threat to the child’s health due to repeated high fever.