Nosebleeds caused by fire all recover on their own and stop without excessive treatment. However, leukemia bleeding may bleed more than one time, and the bleeding is very large, especially children’s acute leukemia will bleed more than one time and pale, there is a clear difference between these two cases. Nosebleeds in leukemia are mainly caused by thrombocytopenia and abnormal coagulation function due to diseases of the blood system; while most of the general nosebleeds are due to localized blood vessel rupture and bleeding. In the former case, the bleeding is usually extensive and difficult to stop, and will occur repeatedly. The latter can be stopped by compression, and leukemic bleeding will be accompanied by a series of other symptoms, such as fever, pallor, fatigue and so on. When nosebleeds occur, it is necessary to go to the hospital in time, under the guidance of the doctor for examination and treatment, to avoid delaying the condition.