Fever is the most common symptom when a child has a cold, and is a way for the body to fight against pathogenic microorganisms. Generally speaking, the more intense the fever, the stronger the body’s ability to fight back. little babies within 3 months of age rarely have high fever even with severe pneumonia because their immune function is not yet developed and their resistance is not strong. Therefore, the degree of fever does not correlate positively with the severity of the disease. Some children may not be severely ill despite having a high fever of 40°C. Otherwise, they must be mentally expressed and may well be depressed or drowsy, and given antipyretic drugs when they encounter fever. Whether to use drugs to reduce fever must be based on the degree of fever, body temperature at 37.5-38 ℃ for low fever, 38-39 ℃ for medium fever, > 39 ℃ for high fever. If the body temperature is still >38.5℃ after physical cooling, it is best to use antipyretic drugs because the child’s nervous system is not yet mature and can easily trigger hyperthermic convulsions. Continuous high fever will lead to increased consumption of oxygen and nutrients, which will increase the burden on various organs and easily cause dysfunction of important organs, especially cardiovascular and cerebrovascular. Hyperthermia (>41°C) can lead to brain cell damage, coma and even death. The implementation of physical cooling methods is not in place more water to replenish body fluids to the child to drink more water to replenish body fluids is the first priority, which is the most basic cooling method. Various juice drinks are available, but plain water is best. Warm water wipe, not alcohol wipe. Warm water wipe is a good cooling method, the temperature of the water at 34-37 ℃ is suitable for children of all ages. Each wipe should last >10 min. Undress the child and wipe the whole body with a warm water towel, focusing on the neck, armpits, elbows, thighs and other large blood vessels to expand the blood vessels and increase heat dissipation. Lowering the ambient temperature is not suitable for all children with fever requires heat exchange with the surrounding area, the appropriate ambient temperature is conducive to fever reduction, the best ambient temperature is 20-24 ℃, in order to make the body temperature slowly drop. Remember that sweating must not be covered to prevent the emergence of fever syndrome, etc. For small infants, especially in summer, their body temperature will slowly drop if they are left open and placed in a cool place. It should be noted that this method is not suitable if the early stage of fever is accompanied by chills and chills in the child. The fever-reducing effect of fever patches is limited Fever patches have a limited fever-reducing effect due to their small size. The medicine that has a good fever-reducing effect is good medicine. If the child still has a high fever after drinking more water and physical cooling, especially if it exceeds 38.5 degrees Celsius, you generally have to use antipyretic drugs. Some people think that a good antipyretic effect is a good drug, but it is not, must take into account the adverse effects of the drug. Generally speaking, the antipyretic effect and adverse reactions of antipyretic drugs are directly proportional to each other, the better the effect, the greater the adverse reactions. Relatively speaking, acetaminophen and ibuprofen are the most commonly used antipyretic drugs for children because they have a good antipyretic effect, relatively small adverse reactions, and are basically safe at normal doses.