Ice packs can be applied after tooth extraction, and ice packs after tooth extraction can achieve the purpose of reducing bleeding and hematoma. The following things need to be noted after tooth extraction: i. After tooth extraction, bite a clean cotton ball for 30 minutes to one hour at the location of the extracted tooth for pressure to stop bleeding. 2. You can eat and drink only after 2-3 hours after tooth extraction, but try to eat with the non-extracted side. Third, you should not brush your teeth or rinse your mouth within 24 hours after tooth extraction to prevent the blood clot in the extraction wound from falling off, followed by bleeding and hematoma in the extraction wound, which eventually leads to the possibility of inflammation and infection. Within 24 hours after tooth extraction, local cold compresses should be applied to reduce bleeding and hematoma of the extraction wound. The possibility of bleeding is very small at this time, and hot compresses can promote blood circulation and better healing of the extraction wound.