A high hemoglobin level means an increase in the concentration of hemoglobin, and an increase in hemoglobin concentration can be seen in a variety of situations. First, if the patient is severely dehydrated, such as severe diarrhea and vomiting, the hemoglobin content will be significantly increased due to blood concentration. The most effective method is to actively rehydrate, such as supplemental saline, supplemental sodium bicarbonate, etc. After rehydration, the blood volume will recover and the high hemoglobin content will be significantly improved. Second, it can be seen in long-term chronic hypoxic diseases, such as chronic obstructive pulmonary disease patients, due to long-term hypoxia, the body’s erythropoietin concentration increases, causing the number of red blood cells to increase, there will also be an increase in hemoglobin concentration content. The most effective method for this disease is to improve the lack of oxygen in the body, you can take oxygen in small doses for a long time, and at the same time give the blood circulation and blood stasis medication, after treatment, the high hemoglobin content in the body will also improve.