After wisdom tooth extraction, cotton balls need to be bitten on the location of the extraction wound for 30-60 minutes for compression to stop bleeding. If good hemostasis is not performed, it is likely to lead to bleeding, hematoma and clot dislodgement after wisdom tooth extraction, which may lead to inflammation, infection and dry socket. The matters that need attention after wisdom tooth extraction include hemostasis, diet, oral cleaning, medication and physical therapy, etc., as follows: 1. hemostasis: after tooth extraction, bite cotton balls on the location of the extraction wound to stop bleeding, about 30-60 minutes. 2. diet: 2-3 hours after wisdom tooth extraction before you can eat and drink, when eating, you need to eat warm, cool, thin and soft food, not acidic food, no spicy and stimulating food. 3. Oral hygiene: After wisdom teeth extraction, you cannot brush or rinse your mouth for 24 hours to prevent blood clots from falling out. 4. Medication and physical therapy: After tooth extraction, you can selectively take oral antibiotics and painkillers to relieve symptoms. Within 24 hours after wisdom tooth extraction, cold compresses can be applied to the location of the facial extraction wound to prevent swelling. After 24 hours of tooth extraction, hot compresses can be applied to the area to promote blood circulation and healing.