Judgment of bleeding volume can play a crucial role in clinical treatment, but it is difficult to achieve accuracy in bleeding volume, and estimation is generally used as a reference. An index of 0.5 indicates that the blood volume is in the normal range, an index of 1 indicates that the bleeding volume is between 20% and 30%, and an index of >1 indicates that the bleeding volume has reached 20% or more. It is recommended to test the red blood cells, hemoglobin, red blood cell pressure, etc. It is more accurate to follow the doctor’s advice according to the test results, especially if you have traumatic bleeding, postpartum hemorrhage, gastrointestinal bleeding, visceral bleeding, you must stay calm, avoid anxiety and tension, and follow the doctor’s advice for treatment.