The main thing to look for in anemia is the hemoglobin item of the blood test to assess the degree of anemia. However, to see what causes the anemia, more tests are needed. For example, if the anemia is iron deficiency, the hemoglobin and erythrocyte specific volume and the average erythrocyte hemoglobin volume in the blood will be decreased. In contrast, megaloblastic anemia, which is manifested inside the blood test, shows an increase in the average red blood cell volume and the average red blood cell hemoglobin content. There are also diseases such as aplastic anemia, etc. that are orthocytic orthochromic, etc. However, whatever the cause of anemia, it is recommended that it must be actively treated, because there are also serious diseases that may manifest as anemia, such as leukemia, myelodysplastic syndrome, etc., which are malignant diseases in hematology. Among them, iron deficiency anemia is more common in China, and most of the patients with anemia are iron deficiency anemia, which can be quickly cured by routine application of oral iron with dietary treatment and so on.