Low erythrocyte and pressure volume are commonly associated with anemia, such as iron deficiency anemia, megaloblastic anemia, leukemia, aplastic anemia, and other hematologic disorders. The main reasons for low red blood cell count are: 1) reduced production, such as aplastic anemia, which is a reduction in production, resulting in low red blood cell pressure. 2) reduced raw materials for hematopoiesis, mainly iron, folic acid and vitamin B12, which will reduce the production of red blood cells. 3) hemolytic anemia, under normal circumstances, the life of red blood cells is mainly 120 days, and every day About 1% of red blood cells are removed from the blood, while a corresponding amount of blood is generated from the bone marrow for release. When the life span of red blood cells is shortened, although the bone marrow’s hematopoietic capacity is enhanced, it cannot compensate for the consumption of red blood cells, and this anemia is called hemolytic anemia. 4. Clinically common blood loss anemia, such as gastrointestinal bleeding or excessive menstrual flow, may lead to low red blood cells and pressure volume.