Normal platelets can also be leukemia, but the diagnosis needs to be confirmed by bone marrow cytology and other tests. Because leukemia patients in the early stage of platelets can be normal, but with the progress of the disease, leukemia cells in the bone marrow abnormal proliferation, will inhibit the proliferation of megakaryocytes, megakaryocyte proliferation is inhibited, will lead to a reduction in the production of platelets, manifested in the reduction of platelets. Leukemia patients with disease progression, platelet progressive decline, platelet reduction will lead to increased risk of hemorrhage, and the more serious the degree of platelet reduction, the higher the risk of bleeding. Clinically, it is often believed that when platelets are less than 20×10⁹/L, the risk of spontaneous bleeding increases exponentially, and at this time, active platelet transfusion is needed for supportive therapy to prevent the occurrence of bleeding events. Specific diagnosis and treatment should be made under the supervision of a physician.