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www.mayoclinic.org/symptoms/high-red-blood-cell-count/basics/causes/sym-20050858

High red blood cell count may be caused by low oxygen levels, kidney disease or other problems. Low oxygen levels. Your body may increase red blood cell production to compensate for any condition that results in low oxygen levels, including: Heart disease (such as congenital heart disease in adults) Heart failure

www.emedicinehealth.com/polycythemia_high_red_blood_cell_count/symptom.htm

Polycythemia (High Red Blood Cell Count) Causes. In primary polycythemia, inherent or acquired problems with red blood cell production lead to polycythemia. Two main conditions that belong to this category are polycythemia vera (PV or polycythemia rubra vera [PRV]) and primary familial and congenital polycythemia (PFCP).

www.medicinenet.com/polycythemia_high_red_blood_cell_count/article.htm

Polycythemia (high red blood cell count) is a condition in which the body's red blood cells are elevated. Symptoms include fatigue, headache, itching, abdominal pain, joint pain. Learn about polycythemia causes, treatment, life expectancy, types, and more.

iytmed.com/high-red-blood-cell-count

The terms polycythaemia and erythrocytosis are used by physicians if you have a high red blood cell count. Polycythaemia is an abnormally high concentration of hemoglobin in the blood through an increase in red cell numbers, whereas erythrocytosis just refers to a documented increase of red cell mass.

www.newhealthadvisor.org/High-Red-Blood-Cell-Count.html

The terms polycythaemia and erythrocytosis are used by doctors if you have a high red blood cell count. Polycythaemia is an abnormally high concentration of hemoglobin in the blood through an increase in red cell numbers, whereas erythrocytosis only refers to a documented increase of red cell mass.

www.reference.com/world-view/symptoms-high-red-blood-cell-count-16ef92fe1e539b2c

Typical symptoms of a high red blood cell count include fatigue and weakness, joint pain, itching and headaches, according to MedicineNet. In cases where this condition is accompanied by risk factors such as cancer of the kidney or liver, fullness and weight loss are common, says WebMD.

my.clevelandclinic.org/health/symptoms/17810-high-red-blood-cell-count/...

What causes a high red blood cell count? A high red blood cell count may be a symptom of a disease or disorder, although it doesn’t always indicate a health problem. Health or lifestyle factors can cause a high red blood cell count. Medical conditions that can cause an increase in red blood cells include:

wellnesspathcare.com/causes-symptoms-of-high-red-blood-cell-count

Causes & Symptoms of High Red Blood Cell Count. Polycythemia vera . Polycythemia vera is a type of blood cancer in which your bone marrow makes too many RBCs, which causes your blood to become too thick. Which will make you more likely to have blood clots, a stroke, or even a heart attack.

www.findatopdoc.com/Healthy-Living/rbc-count

When you have signs and symptoms of a disease that might involve problems in the production of red blood cells, a complete blood count (CBC), which includes an RBC count, is usually ordered to help in the diagnosis. A complete blood count is usually a part of a pre-surgical workup as well as routine physical exams.

www.healthline.com/health/rbc-count

A red blood cell count is a blood test that your doctor uses to find out how many red blood cells (RBCs) you have. It’s also known as an erythrocyte count. The test is important because RBCs ...