However, people with PV can have a slightly lower life expectancy than normal due to the increased risk of problems, such as heart attacks and strokes. You can inject it yourself at home once you've become familiar with how to do it. Your GP may refer you to a haematologist a specialist in blood disorders for more tests, to confirm the diagnosis and to determine the underlying cause. Absolute polycythaemia "Absolute polycythaemia" is where your body produces too many red blood cells. If well controlled, polycythaemia should not affect your life expectancy, and you should be able to live a normal life. Make an appointment to see your GP if you have persistent symptoms of polycythaemia. Venesection removing blood Venesection is the simplest and quickest way of reducing the number of red cells in your blood. It may be recommended if you have PV, a history of blood clots, or symptoms suggesting your blood is too thick.