Acquired secondary polycythemia

Acquired secondary polycythemia is a condition in which your body makes too many red blood cells in response to an outside trigger, rather than because of a problem in the bone marrow itself. Unlike primary polycythemia (polycythemia vera), which is caused by a bone marrow disorder, secondary polycythemia happens because something else in your body or environment is driving the overproduction of red blood cells. The most common triggers include chronic low oxygen levels (from lung disease, sleep apnea, heart disease, or living at high altitude), certain kidney conditions, hormone-producing tumors, or long-term use of testosterone or erythropoietin. The word 'acquired' means you were not born with this condition — it developed later in life due to an identifiable cause. When you have too many red blood cells, your blood becomes thicker than normal. This can slow blood flow and raise the risk of blood clots, stroke, and heart attack. Common symptoms include headaches, dizziness, blurred vision, redness of the skin (especially the face), fatigue, and itching. Some people also experience shortness of breath, high blood pressure, or a feeling of fullness in the abdomen. Treatment focuses on identifying and addressing the underlying cause. For example, if sleep apnea is the trigger, using a CPAP machine at night may bring red blood cell counts back to normal. If a medication like testosterone is responsible, adjusting or stopping the drug may help. In some cases, therapeutic phlebotomy (removing blood) is used to quickly lower red blood cell levels and reduce the risk of clotting. With proper management of the underlying condition, many people see significant improvement.

Bring these to your next appointment

• Q1.What is the underlying cause of my secondary polycythemia, and can it be fully treated?,How often will I need blood tests to monitor my red blood cell levels?,Will I need regular phlebotomy, and if so, how often?,Should I take low-dose aspirin or any other medication to reduce my clotting risk?,Are there lifestyle changes — like hydration, exercise, or diet — that can help manage my condition?,What warning signs should prompt me to seek emergency care?,Could any of my current medications be contributing to this condition?

Common questions about Acquired secondary polycythemia