The cause of dental bleeding may be caused by oral diseases, blood system diseases, cirrhosis of the liver, high blood pressure and other diseases, you need to consult a doctor in time to find out the cause. 1. Oral diseases: such as gingivitis, periodontitis can appear teeth congestion, bleeding performance, need to clean the oral cavity, if necessary, to give anti-inflammatory symptomatic supportive treatment, so that the bleeding of teeth to stop. 2. Blood system diseases: such as leukemia can lead to thrombocytopenia, coagulation factor reduction, which leads to dental bleeding. We need to treat leukemia with appropriate medication to control tooth bleeding. 3. Cirrhosis of the liver: this disease can lead to the body’s blood clotting function is reduced, causing bleeding gums. Cirrhosis of the liver needs to be treated in order to effectively stop bleeding. 4. Hypertension: high blood pressure may also cause bleeding teeth, need to control blood pressure in time to improve the symptoms of bleeding teeth.