Any time cold - regardless of the vehicle - is used on the skin, it reduces inflammation and swelling, which can temporarily improve the contours of the face. "Icing is also anti-inflammatory, which helps calm acne, large pores, puffiness, and eye bags," says esthetician Amber Rose Johnson. "It constricts the blood vessels to improve circulation, and as blood starts to rise to the skin's surface, there is an instantly contoured, glowing look," she says. Simply put, less inflammation equals less puff for more definition and better contour.