Frequent nosebleeds are not necessarily leukemia. Because frequent nosebleeds can occur in two ways, as follows: 1) localized bleeding in the nasal cavity; 2) a significant decrease in the number of platelets, or abnormalities in coagulation function. If you have frequent nosebleeds, but no other parts of the body, especially the parts that are prone to collision, you should first suspect the possibility of localized nasal injury or hemangioma, which may cause repeated localized bleeding. If the patient’s blood count is normal and coagulation function is normal, recurrent nasal bleeding is more likely to be localized. If the patient’s platelets are significantly reduced by routine blood tests, or if there is a significant increase in white blood cells, or if there are infantile cells in the peripheral blood, only then will the possibility of leukemia be suspected, and only then will a bone marrow test be performed to further clarify the diagnosis.