Fever, a defense response of the body to disease. Pediatric fever is a common symptom of many pediatric diseases. Low fever, with a body temperature between 37 and 38.5 ℃, is not harmful to the body, and for some diseases, it also helps the body to recover, so there is no need to take special cooling and antipyretic measures. However, moderate fever (body temperature 38.5～39℃) and high fever (body temperature over 39℃) can cause damage to the body if it lasts too long, especially it has adverse effects on the central nervous system, so measures must be taken for early treatment and careful care. How should parents care for their children with fever and what should they pay attention to? In short, it is to understand the “three preferences” and “three taboos” of a feverish child, observe carefully and take care of it. 1, it is advisable to keep the home air circulation. As we all know, heat dissipation, mainly through convection, conduction and evaporation three mechanisms, so the circulation of air, conducive to heat dissipation and cooling. 2, it is advisable to drink more water, drinking water can replenish the water evaporated due to fever. Sweating after drinking water, the evaporation of water, can help reduce fever. In addition, the increase in urination can also make part of the heat carried out by urine, accelerating the reduction of fever. If you sweat a lot, you should dry it in time to prevent a cold. 3, it is appropriate to use appropriate anti-fever measures. Physical cooling is a method of reducing fever using the principles of convection, conduction and evaporation of physical heat dissipation, which is safe, easy and reliable, and is the preferred antipyretic measure. For example, opening windows and doors, or using fans to accelerate air circulation, is a method that uses the principle of convection, and can be used in all households. The view that you can’t open windows and blow fans when you have a fever is wrong. Of course, you can’t blow a fan on a sick child. According to the principle of heat conduction, ice or cold water can also be used to reduce fever head and neck, armpits and bilateral groin method. Ice, ice bags need to be wrapped outside a layer of cloth to prevent local skin frostbite. Swabbing with 35-40% alcohol or warm water at about 30 ℃, cocoa to make the skin capillaries dilate, accelerate the evaporation of water, is also a fairly simple method of fever reduction. When swabbing with alcohol, be careful not to swab the head, face and chest. When physical cooling methods are not effective, appropriate antipyretic drugs can be used under the guidance of a doctor. For feverish children, we must also pay attention to the following three taboos: 1, avoid tightly closed doors and windows, too much clothing. Doors and windows closed, not conducive to air circulation, too much clothing, hindering the distribution of heat and evaporation, are not beneficial to reduce fever. 2, avoid the abuse of antipyretic drugs. Antipyretic drugs have side effects, some can even cause hypocellularity, bleeding, hemolysis and other serious reactions, more with no benefit. 3, avoid antipyretic too fast. Fever reduction too fast, too fierce, can cause a large loss of body fluids in children, causing a drop in blood pressure, and even shock, so the fever should be gentle, should not be too fast. Fever in children is only one manifestation of various diseases. The absence of fever does not necessarily mean that there is no disease, and the remission of fever does not mean that the disease has been cured. Therefore, the key still lies in the treatment of the original disease.