Bleeding teeth may be the emergence of dental calculus, gingivitis, periodontitis and other diseases. 1. Dental calculus, clinically, after the appearance of dental calculus, calculus adhesion stimulation of gum tissue, bleeding teeth may occur. 2. Gingivitis, gingivitis in some patients, inflammation leads to gum tissue congestion and edema, stimulation of the gum tissue capillary rupture, bleeding teeth symptoms. 3. Periodontitis, patients with periodontitis after a large number of inflammatory media stimulation of periodontal tissues, resulting in periodontal tissue lesions, bleeding teeth. Patients usually need to pay attention to oral hygiene, keep the mouth clean, regular oral examination. If there are abnormalities, it is best to consult a doctor in time for examination and treatment.