Gums do not bleed for no reason, if they are very healthy they will not bleed. Clinically there are many causes of bleeding gums, the most common cases are usually gingivitis and periodontitis. Gingivitis and periodontitis are caused by poor oral hygiene and the presence of large amounts of plaque and tartar around the teeth, which provides a breeding ground for bacteria in the mouth and over time causes inflammation of the gums. The typical symptoms of gingivitis are swollen gums and bleeding under stimulation, which generally include bleeding from brushing and biting hard objects. In addition, bleeding gums need to exclude systemic systemic diseases, such as hematologic diseases, commonly including hemophilia, aplastic anemia, leukemia, etc., which may also be the cause of bleeding gums. Clinically, gum bleeding may also occur if there is high blood pressure coupled with mild gum symptoms, so high blood pressure is also a causative factor for gum bleeding.