White blood cells usually refer to white blood cells, which can be increased, decreased or normal in leukemia, so you cannot tell if you have leukemia by how many white blood cells are above normal. In most cases of leukemia, the white blood cell count is elevated, but this is not absolute. At the onset of leukemia, the patient’s peripheral blood leukocytes may be increased, decreased, or normal. In some cases of acute leukemia, the white blood cell count is low or even decreased, so the white blood cell count cannot usually be used to diagnose leukemia. The diagnosis of leukemia requires a combination of clinical manifestations, blood counts, bone marrow aspiration, and bone marrow biopsy. Therefore, when there is an abnormal increase in white blood cells, it is necessary to consult a doctor for further treatment or therapy after the cause is clarified under the doctor’s guidance.