Many parents find that their children have fever at night but normal during the day. When this happens, we can consider the following two causes: Excessive temperature difference between day and night: For small children who are still developing, the temperature difference between day and night has a great impact on the body. If the child’s resistance is normally poor, he or she will get cold at night, causing a cough and fever. If the temperature is higher during the day, it will not occur. You can properly supplement your child’s nutrition to strengthen the resistance. If the child has a feverish reaction, it may not appear during the day, because the child is attracted to many things during the day, and the cerebral cortex is relatively excited, and this excitement mechanism will suppress the fever, so the fever will not appear during the day. It is likely to be due to some kind of disease. Therefore, if a child has a normal fever at night and during the day, it may be a physiological factor, but it may also be a pathological factor, so it is best to take the child to a regular children’s hospital for a detailed examination. To rule out pathological causes of fever.