Generally, patients with iron deficiency anemia can go up by taking iron supplements for about 1 month, but due to individual differences, some patients with anemia need to take them for about 3 months before they can go up. If the anemia is caused by other reasons, such as leukemia, taking iron supplements is not effective. Anemia is a clinical syndrome in which the volume of red blood cells in the peripheral blood of the human body is reduced, below the lower limit of the normal range, and unable to adequately supply oxygen to tissues and organs. It is common in iron deficiency anemia. In addition, acute leukemia, aplastic anemia, liver diseases and autoimmune diseases can also cause anemia. 1. In general, patients with iron deficiency anemia can have their hemoglobin concentration increased in about 1 month after taking iron supplements (ferrous succinate, etc.) as prescribed by the doctor. However, due to individual differences, it is impossible to generalize how long the hemoglobin concentration of anemic patients can be increased by taking iron supplements. Some patients with more severe conditions may need to take the medicine for about 3 months before their hemoglobin concentration rises. 2. It should be noted that other causes of anemia, such as leukemia, autoimmune diseases and other causes of anemia, oral iron does not work. If the patient has anemia, it is recommended to consult a doctor in time, actively cooperate with the doctor to clarify the cause of the disease, and standardize the treatment under the guidance of the doctor. Anemia patients also need to rest more, do not stay up late, and develop good habits. Reasonable diet, more intake of food containing high protein, high calorie, iron and other nutrients.