Fever and nosebleeds are not necessarily early symptoms of leukemia, but may also be caused by other diseases and need to be differentiated. Leukemia is a malignant disease of the blood system that can present with bleeding, infection, varying degrees of fever, anemia, and enlarged lymph nodes, so fever and nosebleeds may be one of the early symptoms of a patient with leukemia. If you want to clarify leukemia, you must go to the hematology department of the hospital for blood tests, bone marrow biopsy, and other tests to clarify the diagnosis. Other diseases can also cause fever and nosebleeds, such as common cold, especially when the weather is dry and caused by feeling wind-heat, can manifest fever and nasal bleeding; nasal inflammation can also appear fever and nasal bleeding. Therefore, when fever and nosebleed occur, you need to actively consult the internal medicine or hematology department to make a clear diagnosis and give reasonable treatment.