When the body temperature reaches 37.5 ℃ and less than 38.5 ℃, you can use the antipyretic paste, the manufacturer of different, the replacement time of the antipyretic paste also exists a certain difference, generally 4-8 hours. The use of antipyretic paste belongs to a kind of physical cooling, the principle is the antipyretic paste in the gel texture of the liquid into gas, evaporated into the air, so as to take away the heat of the patient’s body, to achieve the purpose of cooling. You can keep the antipyretic patch in the refrigerator during the day, and then take it out of the refrigerator when you need to use it, so that the effect is better. When using the antipyretic paste on the patient’s forehead, or the neck, occiput and groin and other large blood vessels, can better achieve cooling effect. It also contains certain herbal ingredients, which can prevent brain damage due to excessive heat when applied to the forehead, thus playing a role in protecting the brain. When using fever patches, it is important to hydrate the patient frequently. It should be noted that if there is a history of high fever convulsions, antipyretic patches should not be used. Also the use of antipyretic patches should be stopped when the body temperature has receded to normal levels. For patients below 38.5°C, physical cooling with fever patches, warm water baths, ice packs, etc. are all feasible measures. However, when the body temperature reaches 38.5℃ or higher, physical cooling is not recommended and oral medications such as ibuprofen, acetaminophen and other antipyretic drugs are required. If the fever does not subside, it is recommended to take the patient to the hospital for examination and treatment.