It is generally recommended to apply ice for 48 hours after wisdom tooth extraction to prevent the blood clot in the extraction wound from falling off and secondary bleeding and hematoma. Patients need to pay attention to the following matters after wisdom tooth extraction: i. After wisdom tooth extraction, you need to bite cotton ball or gauze for 30 minutes to one hour for compression to stop bleeding. It is recommended to eat warm, cool, fine and soft food, and not to eat spicy and irritating food, as well as overheated and hard food. Third, you cannot brush or rinse your mouth within 24 hours after wisdom tooth extraction to prevent the blood clot in the extraction wound from falling off and secondary bleeding, hematoma, inflammation, infection, etc. Within 48 hours after wisdom tooth extraction, cold compresses should be applied locally to the extraction wound to prevent bleeding, and after 48 hours, hot compresses should be applied locally to the extraction wound to promote blood circulation and healing of the extraction wound. V. If there is obvious pain after wisdom tooth extraction and the pain is unbearable, you can take oral pain medication such as loxoprofen sodium, ibuprofen, fenbid, etc.