What Happens If Your Body Makes Too Much Blood?

By Staff WriterLast Updated Apr 15, 2020 8:36:32 PM ET

When the body makes too much blood, it increases the number of red blood cells that make the blood too thick, increasing the risk of formation of blood clots, states the National Heart Lung and Blood Institute. Blood clotting blocks the circulation of blood in the arteries and veins, leading to stroke and heart attack. This situation occurs as a result of a rare blood disease called Polycythemia vera.