A high mean red cell hemoglobin level is most often seen in macrocytic anemia. There are many types of macrocytic anemia, including megaloblastic anemia and pernicious anemia, which may lead to high mean red blood cell hemoglobin levels. Macrocytic anemia may cause weakness, fatigue, and in severe cases, dizziness and headaches. If megaloblastic anemia is diagnosed, folic acid and vitamin B12 should be supplemented, and iron supplements are needed if necessary. When the average red blood cell hemoglobin content is found to be high, the cause of the disease should be clarified under the guidance of the physician, and the medication should be used reasonably, and should not be taken without authorization, so as not to cause adverse reactions. During this period, various indicators should also be regularly monitored, and then the treatment program should be appropriately adjusted according to the diagnostic results.