There is no scientific concept of early and late stages of acute leukemia, and once diagnosed, the disease should be treated under the guidance of a physician. Acute leukemia is a malignant clonal disease in which a large number of primitive cells in the bone marrow proliferate abnormally and the normal hematopoietic function is inhibited. Early clinical symptoms of some patients are not obvious, and may include weakness, fever, lack of appetite, dizziness, tinnitus, palpitations (rapid heartbeat, often accompanied by panic), pallor, and skin petechiae, etc. If patients feel unwell, they should go to the hospital promptly. If patients feel unwell, they should go to the hospital for examination in time to detect acute leukemia at an early stage. Early symptoms are usually atypical, and some patients have only mild discomfort and do not go to the hospital in time for checkups. When serious anemia, infection, or bleeding occurs, the condition may have already progressively worsened, and it is very easy for life to be endangered due to serious complications. Therefore, when fever, bleeding, infection and other symptoms occur, it is recommended to go to the hospital in a timely manner, under the guidance of physicians to receive treatment.