A hemoglobin of 175g/L is not normal; normal hemoglobin values are 119-154g/L for men and 106-135g/L for women, so this value is on the high side. Elevated hemoglobin is common in the following conditions: 1. True erythrocytosis. 2. Dehydration due to various reasons, pulmonary heart disease, congenital heart disease, etc. 3. It can be seen in plateau-dwelling people. Hemoglobin is a special protein that transports oxygen within the red blood cells, and different people have different values of hemoglobin. Adult male 119~154g/L, adult female 106~135g/L, children: 120~140g/L, newborn 180~190g/L. If the hemoglobin continues to rise, the patient should combine the other data on the laboratory test and the symptoms to consult a doctor in time, improve the examination to clarify the cause of the disease, and then give targeted treatment under the guidance of the physician.