Health condition
Anaemia of chronic disease
Anaemia of chronic disease - now called anaemia of inflammation - is the body's iron-hoarding response to long-term illness, from arthritis to kidney disease; treating the underlying condition matters more than iron tablets, which usually cannot help.
Why trust this guide
- 01
Editorial team
Written by our editorial team from the UK sources listed on each page.
- 02
Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
- 03
Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
-
Mechanism: inflammation raises hepcidin, which locks iron away in stores and blocks gut absorption - iron is present but inaccessible
-
Typical picture: mild-to-moderate anaemia with low serum iron but normal or high ferritin, in someone with infection, autoimmune disease, kidney disease or cancer
-
Distinguishing it from iron deficiency (and spotting when both coexist) is the central diagnostic task - transferrin saturation and inflammation-adjusted ferritin interpretation do the work
-
Specialist: a consultant haematologist for diagnostic uncertainty; treatment targets the underlying disease, with IV iron or other agents in selected situations
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
The body treats chronic inflammation as if it were sustained infection, and one of its ancient defences is starving invaders of iron: the hormone hepcidin rises, slamming shut the gates that release iron from stores and admit it from food - useful against bacteria, counterproductive across the months and years of rheumatoid arthritis, inflammatory bowel disease, chronic infection, kidney disease or malignancy, where the result is a steady, moderate anaemia that compounds the underlying illness's fatigue. The laboratory signature reflects trapped rather than absent iron: serum iron runs low while ferritin - both an iron store marker and an inflammation protein - sits normal or high, and the anaemia's severity loosely tracks disease activity.
Diagnosis and treatment routes
The diagnostic craft lies in separating this from true iron deficiency and in recognising their frequent coexistence - a ferritin that would reassure in health may still mean empty stores during inflammation, so thresholds are adjusted upward and transferrin saturation weighed alongside - because the treatments differ: pure anaemia of inflammation responds to controlling the underlying disease (the anaemia of well-treated rheumatoid arthritis melts away with remission), while coexisting deficiency merits iron, usually intravenously since tablets cannot cross a hepcidin blockade. Erythropoietin-stimulating agents retain a defined role in kidney disease and selected other settings, and the pragmatic clinical thread runs throughout: an anaemia that is fully explained still deserves periodic re-explanation, since new-onset or deepening anaemia in chronic disease can signal bleeding, deficiency or disease change rather than more of the same. In many parts of the UK, routine NHS referrals for this kind of problem currently take 20-45+ weeks, whereas an initial appointment with a private consultant is typically available within around two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant haematologist. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Anaemia of chronic disease.
Quick, plain-English answers to what people ask us most.
-
What is anaemia of chronic disease?
Anaemia of chronic disease is a common form of anaemia that develops as a consequence of long-term illness, such as chronic infection, inflammatory conditions, or cancer, rather than from a direct problem with blood or iron itself.
-
What causes anaemia of chronic disease?
It results from the body's inflammatory response to chronic illness disrupting normal iron use and red blood cell production, even when iron stores in the body may actually be normal or increased.
-
What are the symptoms of anaemia of chronic disease?
Symptoms include fatigue, weakness, pale skin, and breathlessness on exertion, often overlapping with and sometimes overshadowed by symptoms of the underlying chronic condition.
-
Is anaemia of chronic disease dangerous?
It is not usually immediately dangerous, but it can worsen quality of life and exercise tolerance, and significant anaemia can put additional strain on the heart, particularly in those with underlying heart disease.
-
Can anaemia of chronic disease be treated?
Yes, treating or better controlling the underlying chronic condition often improves the anaemia, and in some cases specific treatments such as erythropoiesis-stimulating agents may be used.
-
How is anaemia of chronic disease treated?
Treatment primarily focuses on managing the underlying chronic illness; iron supplementation is generally not helpful unless there's also a genuine iron deficiency, and other specific treatments may be considered depending on the underlying cause and severity.
-
How is anaemia of chronic disease diagnosed?
Diagnosis involves blood tests showing a characteristic pattern, including normal or high iron stores (ferritin) despite low blood iron levels, distinguishing it from true iron deficiency anaemia.
-
Anaemia of chronic disease vs iron deficiency anaemia — what's the difference?
Iron deficiency anaemia results from genuinely low iron stores, often from blood loss or poor absorption, and responds well to iron supplementation, while anaemia of chronic disease occurs despite normal or high iron stores due to inflammation disrupting iron use, and doesn't typically respond to iron supplements alone.
-
Does treating the underlying illness always resolve anaemia of chronic disease?
Often it improves significantly, but resolution depends on how well the underlying chronic condition can be controlled; persistent chronic illness may mean the anaemia persists to some degree.
-
When should I see a doctor about possible anaemia of chronic disease, and how quickly can I be seen privately?
See a doctor if you have unexplained fatigue alongside a known chronic condition. NHS referral for further investigation can take several weeks, while private assessment, including relevant blood tests, is often available within about a week.