High Red Blood Cells (Polycythemia) Signs & Symptoms (& Why They Occur)

High levels of red blood cells, a condition known as polycythemia or erythrocytosis, can be caused by a condition known as polycythemia vera, or it can be a consequence of environmental (high altitude) or pulmonary diseases (like chronic obstructive pulmonary disease, COPD). In this lesson, we discuss the signs and symptoms of having too many red blood cells and why those signs and symptoms occur.

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JJ

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