If the erythrocyte ratio is low, it is important to consider whether the patient is anemic and to check the patient’s hemoglobin and red blood cell count as well. If the red blood cell count is low or the hemoglobin is low, the patient may be anemic. It is important to note that some patients present with a low erythrocyte product not due to anemia, but due to physiological factors, such as the patient drinking large amounts of water, drinking 1000mL or more, diluting the blood cells, a condition known as physiological hypoerythrocyte pressure product. There are also some pregnant women and elderly people, due to special reasons of the organism, can also cause low erythrocyte specific product. Specific analysis is needed for specific problems to avoid mistaking physiological erythrocyte specific product hypotension for pathological erythrocyte specific product hypotension.