Bleeding gums are not necessarily a precursor to leukemia, but may also be caused by periodontal diseases such as gingivitis and periodontitis. Bleeding gums may be caused by inflammatory lesions such as gingivitis formed by dental calculus or soft tartar or plaque that irritate the gums. Generally, the bleeding can be easily stopped and may be accompanied by symptoms such as local itching and swelling of the gums and bad breath. However, if the bleeding is difficult to stop and accompanied by abnormal bleeding from other parts of the body, such as bruising and pinpoint blood spots on the nasal cavity and skin mucosa, unexplained and repeated fever, swollen lymph nodes in the neck and armpits, etc., it may be a precursor of leukemia and needs to be taken seriously. For gum bleeding caused by oral uncleanliness alone, treatment such as scaling at a dentist is recommended. If there are suspected symptoms of leukemia, you can go to the hematology department for routine blood and bone marrow smear tests to clarify the diagnosis so as to provide timely treatment.