In everyday life, people almost always experience bleeding gums when they brush their teeth or bite down on hard objects. The vast majority of bleeding gums are due to inflammation of the gums. Gum inflammation is usually associated with poor oral hygiene and is caused by the long-term attachment of plaque and tartar on the tooth surface or between the teeth. Food embedding, poor restorations, and poor oral hygiene habits can trigger the accumulation of plaque and tartar, which can lead to gingivitis and periodontitis. In addition, during puberty and pregnancy, changes in systemic endocrine secretion can lead to bleeding gums and gum hyperplasia, resulting in adolescent gingivitis, gingivitis during pregnancy and gingival tumors. Gum bleeding can also be induced if suffering from systemic diseases, such as leukemia, diabetes, cardiovascular diseases, abnormal liver and kidney functions, tumors, etc. As gingival bleeding is mostly caused by local factors, gingival bleeding should be treated with supragingival scaling (scaling) and necessary subgingival scaling to remove plaque, tartar and other pathogenic factors at a regular dental hospital or clinic as early as possible, and gingival bleeding will receive good results after treatment. It is important to develop good oral hygiene habits, including brushing your teeth correctly in the morning and evening (BASS brushing method) and using dental floss or interdental brushes to clean the plaque between the teeth. Because of the recurrent nature of gum inflammation, patients with gingivitis need scaling every six months to a year, and patients with periodontitis need scaling and subgingival scaling every 3-6 months, as well as quitting smoking and increasing the intake of fruits and vegetables. For gum bleeding caused by systemic diseases, we should pay enough attention to it and promptly go to a general hospital for relevant examinations, such as blood routine, coagulation phase, liver and kidney function, etc., so as to take treatment measures for the cause of the disease.