The causes of bleeding gums include periodontal disease, abnormal coagulation function, endocrine diseases and so on. 1. Periodontal disease: If there are oral diseases such as gingivitis and periodontitis, dental calculus and plaque often lead to bleeding gums, which is the most common cause. Periodontal treatment is needed. 2. Abnormal coagulation function: Abnormal coagulation mechanism manifested as thrombocytopenia or abnormal coagulation function, there will be spontaneous bleeding of the gums, usually accompanied by weakness, and less white blood cells and other symptoms. Patients should be treated for abnormal coagulation function in order to solve the problem of bleeding gums. 3. Endocrine diseases: common as diabetic patients may appear gingivitis, periodontitis, gingival redness, swelling, shrinkage, bleeding and other manifestations. Patients should actively treat the primary disease, and pay attention to oral hygiene to improve the bleeding gums. Bleeding gums, should consult a doctor in time to find out the cause, and active treatment.