The maintenance time varies from brand to brand and manufacturer of antipyretic patches. The cooling effect of most fever-reducing patches can be maintained between 4-8 hours, and some can last up to 10 hours. Topical antipyretic patches are mainly used for local physical cooling of fever, and the duration of each antipyretic patch is about 4-8 hours. Due to the different brands, the duration of effectiveness varies. If a child’s body temperature is lower than 37.5℃, there is no need to apply a fever reducing patch, but to help cool down by drinking more water. Parents can try to observe the cooling degree of the antipyretic patch when using it, and replace it whenever the cooling effect is not good. In addition, the use of fever patches should be decided according to the child’s body temperature, such as the child’s body temperature is high, fever patches cooling time to maintain a shorter. If the child’s body temperature exceeds 38.5 ℃, for a long time, should be promptly to the regular hospital for treatment. In addition, children with fever should pay attention to drink more water to ensure fluid intake and reduce clothing appropriately to promote natural heat dissipation from the body surface.