Bleeding gums are one of the common symptoms in dentistry. There are many causes of bleeding gums, and in addition to simple local problems in the mouth, it may also be an oral lesion manifestation of other systemic diseases. It can also appear in other diseases of the whole body and may indicate diseases of other systems, such as leukemia, after encountering radioactive radiation, autoimmune diseases, etc. 1. Supplementation. There are many causes of bleeding, so the cause must be identified for effective prevention and treatment. If it is a lack of vitamin C, in addition to taking vitamin C tablets under the guidance of a doctor, the diet should also pay more attention to supplementing vitamin C-rich foods and eating more fruits and vegetables. If it is periodontitis, take anti-inflammatory drugs under the guidance of the doctor, and follow the doctor’s instructions for follow-up, not just stopping the medication by yourself. 2. Scaling. Ultrasonic scaling is aimed at removing the calculus part of the teeth. Because calculus is more likely to cause the accumulation of dental bacteria, resulting in gingivitis, bleeding gums and periodontal disease. Therefore, the removal of calculus is a medical act. 3, patients with necrotizing gingivitis should strengthen oral care. Rinse the mouth with 1% hydrogen peroxide, with 2.5% gentamicin glycerin agent bureau coated with the affected area, 1 day many times, the whole body use penicillin and anti-anaerobic bacteria drugs.