Leukemia is one of the most common malignant diseases of the blood system. Normal hematopoietic functions are destroyed due to the disorderly proliferation of immature leukemia cells in the bone marrow. Patients develop a series of symptoms such as anemia, infection, bleeding, etc. The blood routine of leukemia patients can have the following characteristics: I. The number of white blood cells is often increased, but there are also a small number of patients with normal or reduced white blood cell count, but most patients with an increased number and a higher white blood cell count often indicates a higher tumor load, a more serious condition and a poor prognosis. Low hemoglobin. Due to the destruction of normal hematopoietic function, the number of red blood cells decreases in leukemia patients, and most of them have the symptoms of anemia, which manifests as pallor, dizziness and weakness, as well as a decrease in the number of red blood cells and hemoglobin concentration. Third, the platelet count is reduced in most patients, and can be mildly reduced or severely reduced.