There are many reasons for gingival bleeding. Generally speaking, there are the following types: dental calculus stimulation. After dental plaque attached to teeth gradually forms dental calculus due to less brushing times, dental calculus will constantly stimulate gums, which can cause gingival inflammation and bleeding. Tooth cavity stimulates teeth to form dark brown cavities near gums due to tooth decay, and its edges are irregular and sharp, which often irritates gingival ulcers and causes bleeding. Periodontal diseases When lesions occur around teeth, the main symptoms are gingival edema, inflammation, congestion and neovascularization, and chewing or brushing teeth can often cause bleeding. If periodontal disease occurs, it will develop into alveolar abscess or loose teeth, which is more prone to gingival bleeding. These are the most common local causes of gingival bleeding. Some systemic diseases can also cause gingival bleeding. Such as blood diseases, including various types of leukemia, hemophilia, thrombocytopenic purpura, aplastic anemia, granulocytopenia and so on. Clinically, it is also found that some tumors that grow on gums, including tumors that metastasize to gums in other parts of the body, are prone to bleeding. Some diseases, such as liver cirrhosis, hypersplenism, advanced nephritis, etc. , can be caused by lack of vitamin C coagulation function is low or severe anemia, gum bleeding can also occur. Those who suffer from gingival bleeding caused by systemic diseases should go to the hospital for examination and treatment as soon as possible. In addition, some women in adolescence or pregnancy, due to changes in endocrine regulation, gum bleeding also occurs from time to time. After this period, they can heal themselves and generally do not need special treatment. Gingival bleeding, first of all, should go to the hospital to find the cause of bleeding, which is caused by periodontitis and gingivitis, and needs dental treatment, while strengthening oral hygiene; If gingival bleeding is caused by systemic diseases, you should go to the internal medicine department for diagnosis as soon as possible, and rinse your mouth with 1% ~ 3% hydrogen peroxide to prevent oral infection and bad breath caused by bleeding.