Iron deficiency anemia does not usually cause leukemia, but may have complications such as heart failure and growth retardation. While the cause of leukemia is not clear, it is mostly considered to be related to viral infection, heredity, abnormal immune function and other factors. 1. Iron deficiency anemia patients can normalize their hemoglobin through iron supplementation, thus improving their symptoms. If the patient’s condition is more serious or persists for a long time, it may induce complications such as heart enlargement, heart failure, preterm delivery or low birth weight babies, growth retardation, etc. The cause of leukemia is not clear. However, it does not cause leukemia, and there is no direct link between the two diseases. 2. The cause of leukemia is not yet completely clear, and relevant studies have shown that the disease is related to viral infections, physical factors, genetic factors, abnormal immune function and other conditions. Leukemia can also be induced by bad habits such as smoking and alcoholism, or other blood diseases such as lymphoma and multiple myeloma. It is recommended that patients should consult a doctor in time and clarify their own diseases under the guidance of the doctor, whether it is iron deficiency anemia or leukemia, and need to actively carry out targeted treatment.