How does the child have a fever 39 degrees in the middle of the night to do

You should immediately take your child to a regular hospital for blood culture, blood gas analysis and other relevant examinations to investigate disease factors; if it is confirmed that the virus infection is caused, anti-virus, fever and other drugs should be used for treatment; parents should take physical cooling for the child, give the child more hot water to drink, and maintain the balance of water and electrolyte in the body.