Gum bleeding is not necessarily leukemia; it could also be gingivitis, periodontitis, or other diseases of the hematopoietic system. Gum bleeding is a common clinical symptom of gingivitis, caused by irritants like dental plaque and tartar around the teeth, keeping the gum tissue in a congested state. If persistent, this can lead to gum bleeding. This condition can be improved by dental cleaning, followed by medicated rinses around the teeth. If the situation does not improve, it may be due to periapical abscess caused by periapical inflammation of the tooth, which can also result in gum bleeding. In this case, root canal treatment is required, and once the inflammation in the root canal is controlled, the gum bleeding may alleviate on its own. If neither of these treatments is effective, it could be due to an underlying hematopoietic system disease, which would require further examination.