👉 Polycythemia is a condition in which the number of red blood cells (erythrocytes) produced by the liver or other organs increases. This can occur due to an increase in oxygen demand, as well as some genetic abnormalities and certain medications. Polycythemia is often seen in people with sickle cell disease, but it can also be caused by other conditions such as leukemia, aplastic anemia, or hemophilia.
