Fever patches are useful to bring down the body temperature when you have a fever. But because the fever patch is only an alternative to physical cooling, generally in high fever, in order to prevent excessive temperature damage to the human body, causing serious acidosis or organ damage, the body temperature needs to drop appropriately, this time you can put the person in a bathtub of warm water, or wipe the skin surface with alcohol to achieve the body surface cooling, this is called physical cooling. Fever patches are also a simple physical cooling method, but because of its limited ability to physically cool the body, it can only bring down the surface temperature, along with a slight decrease in body temperature. But because most of the reasons for fever are still caused by internal inflammation, so the use of fever patches alone is not enough, it should be necessary to do treatment for the infection of the target pathogens, in order to fundamentally lower the body temperature, so physical cooling is only an auxiliary means of cooling.