What are the causes of tooth brushing bleeding?

The most common causes of tooth brushing bleeding are gingivitis or periodontitis, plaque, calculus accumulation stimulate local gums, gingival sulcus inner wall epithelium ulcer, connective tissue capillary dilation, inflammatory cell infiltration, collagen fiber destruction, gums will show bleeding when brushing or biting hard things, and even show spontaneous bleeding. 2. Local allergic reactions occur, and the gums are red and swollen and prone to bleeding. 3. Gum trauma and periodontal surgery. 4. Changes in hormone levels, such as adolescent gingivitis and pregnancy gingivitis. 5. Hematological diseases, diabetes, cardiovascular diseases, liver and kidney dysfunction, etc. 6. Take anticoagulant drugs, etc. If you brush your teeth and bleed, you need to see a doctor promptly for professional periodontal treatment.