The standard erythrocyte distribution width is 0-15%, higher than this value is the erythrocyte distribution width is high, basically normal, erythrocyte distribution width coefficient of variation is an indicator of whether the size of the red blood cells is uniform, high indicates that the size of the red blood cells is not uniform, related to a variety of factors, can not be judged on the basis of this alone is what disease. It is also important to note that increased erythrocyte distribution width index is mainly seen after chemotherapy for acute gonorrhea, megaloblastic anemia, slow granulation, splenectomy and giant platelets, etc. The loss of symmetrical deep sensation and vibration in the lower extremities. In severe cases, there may be loss of balance and walking disorders. Prevention of high red blood cell distribution width: Adequate quantity and reasonable ratio of nutrients in the diet. Develop good eating habits and do not be picky about what you eat. As long as this is the case, nutritional anemia will not usually occur under normal circumstances. In fact, the human body’s need for iron, folic acid or vitamin B12 is very little, and it is not difficult to meet the ordinary diet as long as it is reasonably well-dispensed. For example, for adults, the daily requirement of iron is 1 to 2 mg, but since the absorption rate of iron in ordinary diet is only 5% to 10%, the recommended daily supply of iron in China is (male) 12 mg and (female) 18 mg. Pay attention to the nutrition and diet of infants and young children, adolescent girls and pregnant women. Due to special physiological needs, their needs for various nutrients related to hematopoiesis are relatively higher than those of normal adults, so they must be reasonably supplemented so that they can meet their physiological needs, and iron or folic acid agents should be supplemented in necessary fashions.