Patients with iron deficiency anemia typically need several months of iron supplementation treatment. The specific reason is that after taking iron supplements, patients' subjective symptoms can recover quickly. The count of reticulocytes generally begins to rise within three to four days after starting the medication, reaching a peak around seven days. Hemoglobin levels notably increase within two weeks of treatment, and generally return to normal around two months. After correcting anemia, it is necessary to continue treatment for at least another three months because the body's iron stores need further supplementation. It is necessary to restore serum ferritin levels to fifty micrograms per liter to replenish these stores fully. This is required to achieve a true cure of iron deficiency anemia, as without this, patients are prone to relapse. Therefore, regular and long-term effective use of iron supplements is an essential basis for ensuring the treatment effectiveness of iron deficiency anemia.