High erythrocytes, hemoglobin, and erythrocyte pressure volume may be associated with true erythrocytosis, plateaus, and congenital heart disease. 1. True erythrocytosis: It is a neoplastic disease with clonal proliferation of bone marrow cells. Due to the proliferation of hematopoietic stem cells, the growth of red blood cells is accelerated, and there is an increase in the number of red blood cells in the peripheral blood. The increase in the number of red blood cells is also harmful to the body, and it is recommended that symptoms should be promptly sought medical attention. 2. Plateau: Due to the reduced atmospheric pressure in the plateau, the body will generate red blood cells after the condition of hypoxia, which will increase the number of red blood cells, hemoglobin, and the pressure volume of the blood cells, and with the increase in elevation, the increase in the number of red blood cells, hemoglobin, and the pressure volume of the red blood cells will be increased. 3. Congenital heart disease: patients with congenital heart disease, due to the whole body is in chronic hypoxia, the body is ischemic, hypoxia, the red blood cells will be compensatory increase, hemoglobin, red blood cell pressure product will also increase. Erythrocyte pressure product continues to increase, should go to the hospital for examination, in the doctor’s standardized guidance for treatment.