How does 4-year-old child have a fever repeatedly to do

Children with recurrent fever and poor immunity, do not pay attention to warm factors. You should take your child to see a regular hospital for blood culture, drug allergy test, etc., if confirmed virus infection caused, should follow the doctor's advice to take antiviral, fever and other drug treatment; parents should pay attention to children at ordinary times, actively take physical cooling for children, drink more hot water.