How does my two-and-a-half-year-old child persist in high fever

Fever is a kind of defense reaction of human body against virus and bacterial infection. The child's persistent high fever indicates inflammation in the body. If the fever exceeds 24 hours, you can take the child to see a doctor for blood routine examination to clarify the cause. At the same time, you should pay attention to supplement water to the child. When the temperature exceeds 38.5 ℃, you can take antipyretic medicine to cool down the child.