I often hear families of children tell me that they use alcohol to reduce their child’s fever. In some older versions of books, you can also see that there is a method to reduce fever with alcohol. However, medicine is constantly advancing and this method has become obsolete because it has so many bad things. Therefore, this method is being phased out clinically, but unfortunately, the old concept is difficult to correct from the public mind for a while. People usually think that the use of alcohol can play a rapid role in reducing fever, in fact, this method will often be contrary to expectations, because when the child is feverish, the skin’s blood vessels expand, the temperature difference between body temperature and cold water is large, which will cause the child’s blood vessels to contract strongly, causing the child to chill, shivering and other uncomfortable symptoms, and even aggravate the child’s hypoxia to appear hypoxemia. Some parents use too high a concentration of alcohol, such as 95% concentration, which not only can not play a role in reducing fever, but also may cause dehydration of the child’s skin, aggravating the condition. In addition, alcohol stimulates the skin too much, and may cause alcohol poisoning, serious cases can also excite the heart vagus nerve through the skin, causing reflex slowing of the heart rate, and even atrial ventricular fibrillation and conduction block, triggering cardiac arrest. At present, the best physical cooling method is still the most reasonable wipe with warm water two degrees lower than the body temperature. Using warm water to reduce fever not only does not irritate the skin, the child is also more acceptable, and the effect of reducing fever is also good. So how many degrees can a child use warm water to physically cool down? In general, clinically, children under 38.5 degrees do not need to reduce fever at all (except for children with a history of febrile convulsions). We know that an appropriate fever is a meaningful response of the body to resist external bacteria and viruses. If you interfere with this response of the body, it will instead prolong the course of the child’s illness. Therefore, a child with a fever of less than 38.5 degrees can be observed and does not need to be treated. If the temperature exceeds 38.5 and the child is in good spirits, then you can use warm water to lower the temperature first, and if it does not work well, then you can choose fever-reducing medicine to take orally at this time. If the temperature exceeds 39 degrees, the effect of their own home medication is not good, then we must hurry to the hospital to see a doctor. Of course, I am talking about the older children (more than three years old), so that the observation, basically will not delay the disease, if the child is small, fever, or go to the hospital as soon as possible to check, while laboratory tests routine, so that the disease will not be delayed. With the development of medicine, medical personnel gradually found that many human reactions, such as fever, vomiting, are a beneficial reaction of the body’s own resistance to external harmful substances, early intervention or less good, unless the symptoms are serious, with drug intervention, so that should be more in line with the physiological characteristics of the human body.