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Published on: 9/13/2026
Correcting an abnormal red blood cell count depends entirely on what is driving it, so treatment ranges from iron, B12, or folate repletion and better hydration to managing kidney disease, thyroid problems, sleep apnea, smoking, or bone marrow disorders. A low RBC count (anemia) is often addressed with dietary changes, supplements, treating blood loss, or in some cases transfusions, while a high count may call for stopping smoking, treating low oxygen levels, or therapeutic phlebotomy. Some abnormal results are mild, temporary, or caused by dehydration, medications, or altitude and resolve without treatment, while others signal a condition that needs prompt evaluation. There are several important factors and warning signs to weigh before assuming your result is harmless, and they are outlined below.
Because an out-of-range RBC value is a clue rather than a diagnosis, the fastest way to make sense of it is to look at the full picture: your other symptoms, your history, and how you have been feeling. A free, instant, online symptom check can help you organize what you are experiencing, understand which causes are most consistent with your situation, and decide whether this warrants a routine follow-up or a sooner conversation with a clinician.
Last reviewed for medical accuracy: 09/12/2026
An abnormal red blood cell (RBC) count on your blood test can feel worrying, but it’s often a clue that your body needs some adjustments—whether through diet, lifestyle changes, or medical treatment. This guide will help you understand what your “rbc blood test” results mean, why they might be high or low, and practical steps you can take to bring them back into the normal range.
Your RBC blood test measures the number of red blood cells in a given volume of blood. Red blood cells carry oxygen from your lungs to the rest of your body and bring carbon dioxide back to be exhaled. A normal RBC count is roughly:
Values outside these ranges may indicate an underlying issue.
Abnormal RBC levels fall into two categories:
Low RBC Count (Anemia)
High RBC Count (Polycythemia)
Confirm the Cause with Your Doctor
Optimize Your Diet
Consider Supplements (as Prescribed)
Treat Underlying Conditions
Lifestyle Adjustments
Identify and Address the Root Cause
Specific Medical Treatments
Lifestyle and Diet Tips
Certain symptoms alongside an abnormal RBC count can signal a more serious problem. Contact your doctor or seek emergency care if you experience:
For any worrisome sign, don’t wait—these could be life-threatening emergencies.
If you’re unsure about your symptoms or test results, consider a free, online symptom check, using the doctor approved Ubie Symptom Checker.
If you have any concerns—especially those that could be life threatening—please speak to a doctor right away.
(References)
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* Pulliam KE, Joseph B, Makley AT, Caldwell CC, Lentsch AB, Goodman MD, Pritts TA. Washing packed red blood cells decreases red blood cell storage lesion formation. Surgery. 2021 Mar;169(3):666-670. doi: 10.1016/j.surg.2020.07.022. Epub 2020 Aug 23. PMID: 32847673; PMCID: PMC7870469.
* Kumukova I, Trakhtman P, Starostin N, Borsakova D, Ignatova A, Bayzyanova Y. Quality assessment of red blood cell suspensions derived from pathogen-reduced whole blood. Vox Sang. 2021 May;116(5):547-556. doi: 10.1111/vox.13039. Epub 2020 Nov 22. PMID: 33222171.
* Chandler WL. Platelet, Red Cell, and Endothelial Activation and Injury During Extracorporeal Membrane Oxygenation. ASAIO J. 2021 Aug 1;67(8):935-942. doi: 10.1097/MAT.0000000000001320. PMID: 33606391.
* Kaito Y, Konuma T, Monna-Oiwa M, Kato S, Isobe M, Okabe M, Imai Y, Takahashi S, Tojo A. Prognostic impacts of peripheral blood erythroblasts after single-unit cord blood transplantation. Int J Lab Hematol. 2021 Dec;43(6):1437-1442. doi: 10.1111/ijlh.13622. Epub 2021 Jun 12. PMID: 34118105.
* Hadjesfandiari N, Serrano K, Levin E, Johal P, Feenstra S, Shih AW, Devine DV. Effect of modern infusion pumps on RBC quality. Transfusion. 2022 Apr;62(4):797-808. doi: 10.1111/trf.16833. Epub 2022 Feb 25. PMID: 35213738.
* Kumral Z, Uysal H, Yılmaz MB. Perennial Parameter for Intravenous Iron Therapy in Heart Failure: Reticulocyte Crisis. Anatol J Cardiol. 2025 Nov 17;30(2):109-115. doi: 10.14744/AnatolJCardiol.2025.5520. PMID: 41243885; PMCID: PMC12908867.
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