A fever of 40℃ may not harm the body, but some primary diseases may cause serious damage to the body. In addition, when the fever is 40℃, the thermoregulatory function of the body tends to lose its balance, and it is easy to have thermoregulatory disorder, and the body temperature may rise continuously at this time. The phenomenon of human death is very dangerous. Therefore, the fever of 40 ℃ may burn the body, it is necessary to quickly carry out antipyretic treatment, it is very necessary to combine antipyretic drugs and physical cooling together with treatment, the effect is faster, you can take oral ibuprofen suspension to reduce fever treatment. If you are an adult, you can also insert indomethacin suppositories into the anus for fever reduction treatment, and you can use diluted white wine or alcohol to rub the skin of the patient’s whole body for physical cooling.