Wisdom teeth extraction with blood clots do not break, blood clot is beneficial to protect the extraction wound, conducive to wound healing and can try to avoid infection, it is recommended to follow the postoperative medical advice, bleeding and pain and other symptoms in a timely manner to consult a doctor. Biting on the hemostatic cotton pad after wisdom tooth extraction will promote the formation of blood clot, which can cover the surface of the extraction wound, protect the wound from food debris, and help prevent bacterial invasion. The blood clot starts to mechanize in about 24 hours and can form connective tissue fibers, which is beneficial to wound healing. If the blood clot is broken, it will bleed easily and may have localized infection, and may cause pain and discomfort, affecting the wound healing, so try to protect the blood clot after tooth extraction and do not break it.