Frequent bleeding of teeth may be caused by periodontal diseases, immune diseases and blood diseases. 1. Periodontal diseases: If you suffer from caries, calculus, periodontal inflammation and other diseases, eating hard food or brushing hard without curing, it will easily lead to localized breakage, and the patient may suffer from frequent bleeding of the teeth. 2. Immune diseases: chronic hepatitis, diabetes, hypertension, etc., can lead to blood clotting dysfunction in the body, the patient may be manifested as frequent bleeding of the gums, which may be spontaneous bleeding of the mucous membranes, or bleeding caused by the rupture of the capillaries by stimulation. 3. Blood diseases: blood diseases such as thrombocytopenia, immune thrombocytopenic purpura, aplastic anemia, myelodysplastic syndromes, or coagulation abnormalities such as hemophilia, the symptoms of frequent bleeding of the teeth can occur. Regardless of the cause of frequent bleeding of teeth, it should be taken seriously.