When adults have a high fever if the temperature is above 40°C, it may cause damage to the central nervous system, and the primary purpose of reducing fever at this time is to avoid damage to the nervous system. So the prompt and fast way to reduce fever is to wrap a wet towel with ice and put it on the forehead or neck to prevent the temperature inside the skull from rising too high, which is the fastest way to stop the temperature from rising, but it does not bring the temperature down immediately, and other methods should be applied. If the temperature does not rise very high, but exceeds 38.5°C, oral ibuprofen can be chosen to reduce the fever, but patients who have significant nausea and vomiting will probably vomit it out and it will not be effective. So there is also the option of applying rectal administration of drugs such as ibuprofen or indomethacin to reduce the fever, and the application will reduce the fever in about 1-2 hours. Patients with particularly pronounced inflammation can also use glucocorticoids appropriately to control the inflammatory response, such as applying dexamethasone or other glucocorticoids, which are only used when the patient’s systemic inflammation is more pronounced. Patients with recurrent high fever also need to be treated for the cause, not simply to reduce the fever. The faster of the allopathic treatments is that the cause should be clearly determined and then the drugs should be applied. If it is a bacterial infection, apply targeted antibiotics with high sensitivity; if it is a viral infection, apply targeted antiviral drugs, the allopathic treatment cannot be generalized.