Hair loss in people with leukemia is not a pre-symptom of leukemia, which means that hair loss has nothing to do with having leukemia. Most hair loss is caused by problems with scalp follicles, or vitamin deficiencies. Leukemia is a malignant clonal disease that originates in the hematopoietic stem cells of the bone marrow, and the normal hematopoietic function of the bone marrow is affected, so the early stage of leukemia patients are mainly fever, anemia, and bleeding. Fever can be chills, high fever, or low fever, and most of them will be accompanied by corresponding organ infections. Anemia will bring about generalized weakness, dizziness, panic, tinnitus, insomnia, etc., while thrombocytopenia is mainly manifested by bleeding, mildly bleeding from skin and mucous membranes, and in severe cases, bleeding from internal organs.