A routine blood test can check for anemia. Routine blood tests contain three major components: white blood cell count and immune related; red blood cell count, which can be used to diagnose whether there is anemia; and platelet count and clotting related. So, to diagnose whether there is anemia, the first thing is to check the blood count, and also to be able to determine whether the anemia is mild, moderate, or severe. However, further tests are needed for the cause of anemia. When the routine blood report indicates anemia, there are other items to look for, such as red blood cell pressure, which refers to the number of red blood cells per unit volume, red blood cell volume, and average hemoglobin volume, which are MCV, MCH, and MCHC. these values can help determine the cause of anemia, such as iron deficiency anemia, megaloblastic anemia, reblastosis, malignant blood disease, or other causes. In fact, anemia is only a symptom, but doctors are most concerned about the “culprit” of anemia. Therefore, to determine whether there is anemia, the first step is to have a blood test, which is also the most economical and easiest way to check.