To stop bleeding after wisdom teeth extraction, take care to protect the blood clot, and use antibiotics and painkillers if necessary, as follows. 1. Hemostasis: After wisdom teeth extraction, you should bite the cotton roll for 40 minutes to stop bleeding, and then spit out the cotton roll after the bleeding stops. 2. Protect the blood clot: the blood clot is vital to the healing of the tooth extraction wound. In order to ensure wound healing and prevent postoperative bleeding do the following. (1) Do not brush your teeth or rinse your mouth for 24 hours after tooth extraction. (2) Eat softer food on the day of extraction and do not overheat the food. (3) Avoid chewing on the side where the tooth was extracted. (4) Do not lick the wound repeatedly with your tongue, let alone sucking it repeatedly. 3. Use of antibiotics and painkillers: mandibular wisdom teeth extraction damage is large, postoperative antibiotics and painkillers can be used appropriately, such as ibuprofen, it is recommended to use the medication under the guidance of a doctor, do not blindly self-medication.