What causes anemia in 4-year-old children

4-year-old child anemia, first of all, it may be caused by malnutrition, iron intake deficiency anemia, such as iron deficiency anemia. Secondly, it may be caused by abnormal hematopoietic system or hemorrhagic anemia. It is recommended to take the baby to the hospital in time for blood routine, serum iron and other tests.