Anti-fever patches are fastest when applied to the parts of the body surface where the large blood vessels pass through, and common areas include the forehead, sides of the neck, armpits, temples, popliteal fossa, and other places. It is recommended to use it according to the instruction manual or doctor’s guidance. Anti-fever patches are a method of physical cooling, will reduce the local temperature, the fever patches in the human body blood vessels rich places, can quickly play a lower blood vessels in the blood temperature, so as to play the role of cooling. So choose forehead, sides of the neck, armpits, temples, popliteal fossa and other large blood vessels traveling through the parts, fever will be a little faster. But be careful not to put the antipyretic patch on the forehead, abdomen, soles, vulva and other parts of the body, easy to diarrhea, stimulation of the vagus nerve and other adverse reactions.