Gingival bleeding is generally divided into two categories: local diseases and systemic diseases. Gum bleeding caused by local causes is common in patients with gingivitis and periodontitis. These patients do not brush their teeth frequently, which leads to the proliferation of tartar. Tartar has an irritating effect on the gums, and the gums will bleed as long as foreign objects touch them slightly. Causes of gum bleeding 1. Lack of vitamin C. Some gum bleeding is caused by a lack of vitamin C. A lack of vitamin C in the gum tissue will cause the growth and outbreak of anaerobic bacteria. This statement is only a superficial explanation. In fact, The source of the problem was not found. 2. The formation of dental calculus. When dental plaque forms on the tooth surface in the mouth, if it is not removed in time, it will gradually harden and form dental calculus. Tartar is mostly located at the junction between teeth and gums. This harder tartar has a continuous stimulating effect on the gums. When normal gums are stimulated by inflammation, the capillaries in the gums increase, become congested, and the color of the gums darkens. However, when irritated, the gums bleed easily. 3. Recurrence of periodontitis When periodontitis occurs in the mouth, not only the gums bleed, but also the teeth begin to become loose. Regular scaling (ultrasonic cleaning) alone cannot restore the disease. Only scaling and other periodontal treatments or Periodontal surgery can relieve symptoms.