How do blood tests show anemia?

A blood checklist usually refers to a routine blood test. The routine blood checklist mainly looks at whether anemia is present by looking at the red blood cell count, hemoglobin amount, average red blood cell volume, average red blood cell hemoglobin amount, and average red blood cell hemoglobin concentration.
If the hemoglobin is lower than normal, anemia can be diagnosed. Based on the average red blood cell volume, average red blood cell hemoglobin content, and hemoglobin concentration, it can be determined whether it is microcytic hypopigmented anemia or macrocytic hypopigmented anemia.
Common clinical anemias include iron deficiency anemia and megaloblastic anemia.
In the case of iron deficiency anemia, there is usually a decrease in red blood cells, a decrease in hemoglobin, and a decrease in mean red blood cell volume, mean hemoglobin volume, and mean hemoglobin concentration, and further refinement of serum iron and ferritin tests are needed to make the diagnosis.
In the case of megaloblastic anemia, in addition to a decrease in red blood cells and hemoglobin, there will be a decrease in white blood cells and platelets, and the mean red blood cell volume, mean hemoglobin volume, and mean hemoglobin concentration will be significantly increased.
The anemia may also be thalassemia and traumatic anemia. It is worth noting that the diagnosis of anemia cannot be confirmed entirely by routine blood tests, but also by other auxiliary tests. However, if routine blood tests indicate anemia, it is necessary to consult a doctor for further treatment or therapy under the guidance of the doctor to identify the cause.