After wisdom tooth extraction, ice can be applied to the cheek corresponding to the side of the tooth extraction, you can buy special ice packs or just buy ice sticks and wrap them with a layer of towel and apply them externally on the skin of the outer cheek corresponding to the wisdom tooth. Note that the temperature should not be too low, so as not to frostbite the local skin. Intermittent icing is recommended and there is no need for long-term, continuous icing. About 1-2 days after tooth extraction, it is recommended to apply ice to the operated area because due to the trauma after tooth extraction, the organism will have a swelling process, and ice can make the swelling relieved, especially it can make the blood vessels constrict, so that the bleeding after the operation can be reduced.