Red blood cells are one of the major components of your blood, along with white blood cells and platelets. Red blood cells help carry oxygen throughout your body. But, when your red blood cell …

Jan 21, 2025 · Heart failure — a condition in which the heart doesn't pump blood as well as it should. Hemoglobinopathy — a condition present at birth that makes red blood cells less able to carry oxygen.

Jul 31, 2025 · Erythrocytosis is when you have more red blood cells than normal. Learn more about what causes it, symptoms of erythrocytosis, and how it's treated.

Nov 8, 2023 · A high red blood cell count can occur for many reasons, including excessive production of cells, changes in blood volume, or underlying medical conditions. Learn more here.

Aug 16, 2024 · Understanding high RBC counts is essential for practitioners and patients, as it can provide insights into various medical conditions and inform healthcare decisions. This article offers a …

Jun 13, 2025 · At higher elevations, oxygen levels are lower, prompting the body to produce more RBCs to enhance oxygen delivery to tissues. If you experience symptoms such as headaches, dizziness, …

The red blood cell count (RBC) can be misleading. It may be high even when hemoglobin and hematocrit are normal—for example, in: thalassemia trait iron deficiency with very small red cells …

Apr 14, 2025 · Polycythemia is an abnormally high increase in red blood cells, leading to elevated hemoglobin and hematocrit. It can be absolute (true increase in RBC mass) or relative (due to …

Jun 1, 2018 · Polycythemia means increased red blood cell volume. Polycythemia is a condition that results in an increased level of circulating red blood cells in the bloodstream. People with …

May 13, 2025 · Along with these tests, the RBC count can not only help diagnose disorders that cause too many or too few red blood cells but also offer clues as to what may be causing the problem. Why …