Anemia and Kidney Disease: Why You Feel So Tired
The kidneys produce a hormone called erythropoietin that tells the bone marrow to make red blood cells. As kidney function falls, less of this hormone is made, so red cell production drops and anemia develops. Anemia is one of the commonest causes of the deep fatigue that accompanies kidney disease, and it is treatable. If tiredness is interfering with your daily life, ask for a blood count and a check of your iron stores rather than assuming it is simply the disease.
Why kidney disease causes anemia
Low erythropoietin is the main driver, but iron deficiency and inflammation also contribute. The result is fewer red cells carrying oxygen, which shows up as tiredness, breathlessness, paleness, and feeling cold.
How it is treated
Treatment usually begins with checking and replacing iron, and may add medicines that stimulate red cell production. Correcting anemia is one of the most reliable ways to improve energy and quality of life in kidney disease.
Common questions
Is tiredness always from anemia?
Not always. Sleep problems, medication effects, and the disease itself contribute. A blood count distinguishes anemia-related fatigue from other causes.
Can I take iron on my own?
Do not start iron supplements without a blood test and medical advice — too much iron is harmful, and the underlying cause needs to be assessed first.
Sources
- KDIGO Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease — Kidney Disease: Improving Global Outcomes (KDIGO)
Have a question this did not answer?
Send it to us. If it is something only your treating doctor can answer, we will say so plainly.
See our editorial and medical review policy.