Fever reduction in children is mainly due to the fact that children’s body temperature exceeds the normal high limit, and they need to apply various means of fever reduction in time to restore the body temperature to normal, so as to avoid fever-induced injuries. Generally, the cause of fever in children is mainly caused by infectious factors, such as infection with Streptococcus pneumoniae, Haemophilus influenzae and so on, which will cause the rise of pyrogen in the body, and then cause fever. Children with temperatures above 37.5℃ in the armpit are considered to have fever. At this time, children can apply physical cooling methods to reduce fever, such as applying antipyretic patches. In addition, if the child has a high fever, with an axillary temperature of more than 39 ℃, then drugs such as ibuprofen can be used to reduce fever.