Children always have fever at night is a relatively common phenomenon, because at night the body’s resistance is often weak. The metabolic rate of the body slows down at night and the activities of the body are weakened, so the resistance is relatively weak. Once a viral or bacterial infection occurs, it is easy to attack the body at night, resulting in a fever at night. The body’s metabolic rate is faster during the day, the body’s functions are more active, and the detoxification function of the liver and kidneys is also more active, so it is less likely that an infection will lead to a fever. It is necessary to take the temperature at night when a fever occurs, and it is important to monitor the child’s body temperature so that it does not exceed 38.5 degrees. Once the temperature exceeds 38.5 degrees, you need to use antipyretic medication, such as oral ibuprofen suspension or acetaminophen pellets, which are still more effective in reducing fever.