The main indicators of blood count in anemic patients are as follows: i. The number of red blood cells, which is 4-5.5 million/mL in normal adult males and 3.5-5 million/mL in adult females. if the number of red blood cells is lower than the lower limit of the normal range, it may be anemia. Second, the hemoglobin concentration is 120-160 g/L for normal adult males and 110-150 g/L for adult females. if the hemoglobin concentration is lower than the lower limit of the normal range, it may be anemia. Third, also look at the average volume of red blood cells. If the average volume of red blood cells is normal and the patient has anemia, it may be aplastic anemia, acute blood loss anemia, and most hemolytic anemias. If the average red blood cell volume is greater than normal, the anemia may be megaloblastic anemia and pernicious anemia. If the average red blood cell volume is less than normal, the greatest possibility is iron deficiency anemia.