The reason why the bleeding of extracted tooth can not be stopped may be related to the tooth in acute inflammation, damage to blood vessels or tearing of the gums when extracting the tooth, and the patient suffers from blood system diseases. 1. The tooth is in acute inflammation: when the tooth is in acute inflammation, the surrounding tissues are congested and edematous, so it is easy to stop bleeding after tooth extraction; if the tooth has chronic apical inflammation, and the granulation tissues are not cleared after extraction, it is also easy to bleed more than the phenomenon after tooth extraction. 2. Injury to blood vessels or gingival laceration during tooth extraction: If the extraction of the affected tooth is more difficult and traumatic, it is easy to injure the surrounding blood vessels or cause gingival laceration, which may lead to the phenomenon of unstoppable bleeding after tooth extraction. 3. Suffering from blood system diseases: If the patient himself has blood system diseases, such as anemia, hemophilia, etc., there will be difficulties in blood clotting, which will cause the bleeding of tooth extraction can not be stopped. There are other possible reasons why you can’t stop bleeding from tooth extraction, so you should consult the doctor in time, improve the examination and standardize the treatment under the guidance of professional doctors to avoid causing adverse consequences.