Fever suppositories belong to anal medicine, mainly used for relieving fever and analgesia, commonly used for patients with body temperature over 38.5℃, generally can play a good role in reducing fever after 15-30 minutes of using fever suppositories. The fever suppositories contain acetaminophen, a non-steroidal anti-inflammatory component, which mainly inhibits the synthesis of prostaglandins and has a strong fever-reducing effect. In addition, the fever suppositories are absorbed through the capillaries under the rectal mucous = mucous membrane, thus entering the blood circulation, capillary absorption is fast and complete, so the effect time is usually very fast. Usually, the fever suppositories are maintained in the body for 4-6 hours, so patients should not use them more than 4 times in 24 hours. In addition, patients with fever should also immediately take physical cooling methods, such as using warm water to wipe the whole body; when a lot of sweating, timely hydration, as soon as possible to the hospital emergency department to identify the cause of the fever, so as not to delay the condition.