There are many causes of anemia, which may be caused by the invasion of bone marrow by malignant tumors, or due to the lack of hematopoietic substances and excessive destruction of red blood cells.
1. Malignant tumors: malignant tumors consume a lot, resulting in malnutrition and relative lack of iron absorption, which can lead to anemia.
2. Deficiency of hematopoietic substances: deficiency of folic acid and/or vitamin B₁₂ leads to impaired cellular DNA synthesis, causing megaloblastic anemia. Iron is an important substance in the synthesis of hemoglobin, when iron deficiency can also cause iron deficiency anemia.
3. Excessive destruction of red blood cells: cell membrane, metabolic enzymes and hemoglobin abnormalities or defects that may be caused by radioactive substances, chemotherapeutic drugs, etc., can cause anemia.
Common causes of anemia also include aplastic anemia and acute leukemia. It is recommended that patients with anemia go to the hospital in a timely manner to clarify the cause of anemia and follow the doctor’s instructions for treatment to avoid delays.