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Also question is, is high hemoglobin A sign of cancer?
Polycythemia vera is a cancer of the blood in which your bone marrow overproduces red blood cells. With polycythemia, a blood test also shows that you have a high red blood cell count and high hematocrit. Common symptoms of high Hgb levels include: itchiness.
Secondly, why would hemoglobin be high?
Causes. A high hemoglobin count occurs most commonly when your body requires an increased oxygen-carrying capacity, usually because: You smoke. You live at a high altitude and your red blood cell production naturally increases to compensate for the lower oxygen supply there.
Diseases and conditions that cause your body to produce fewer red blood cells than normal include: Aplastic anemia. Cancer. Certain medications, such as anti-retroviral drugs for HIV infection and chemotherapy drugs for cancer and other conditions.