Hematologist
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Low haemoglobin from a long-lasting illness, explained | CION Cancer Clinics
Anaemia of chronic disease is a low haemoglobin caused by a long-lasting illness such as kidney disease, arthritis, a lasting infection or cancer. Your body has iron, but inflammation locks it away so the bone marrow cannot use it. It is usually mild. The main treatment is controlling the illness underneath. This page explains the report pattern, how it differs from iron shortage, and what doctors do. At CION Cancer Clinics, our haematologist cares for anaemia, bleeding, clotting and inherited blood disorders, with ArogyaSri, CGHS and cashless insurance accepted.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- What is low haemoglobin of chronic disease?
- Which illnesses can cause it?
- What does the blood report usually show?
- How is it different from plain iron shortage?
- How is it treated?
- What do people often misunderstand about it?
- What should you do next, and what can this page not tell you?
- Common questions about low haemoglobin of chronic disease
The short answer
What is low haemoglobin of chronic disease?
It is a low haemoglobin caused by an illness that has gone on for a long time, such as kidney disease, joint inflammation, a lasting infection or cancer. Your body has iron, but the illness stops the bone marrow from using it, so fewer red cells are made.
Why the iron gets locked away
When the body is fighting inflammation, the liver makes more of a hormone called hepcidin. Hepcidin shuts the doors that let iron out of storage and out of the gut. It is a defence, because germs need iron too. The side effect is that the marrow is short of iron even while the stores are full. Inflammation also shortens the life of red cells and dulls the marrow's response to erythropoietin, the kidney hormone that tells it to make more.
How serious it usually is
It is usually mild to moderate and comes on slowly. Many people notice only tiredness or less energy for work. It rarely falls very low on its own. If the count is dropping fast or is very low, doctors look for a second cause, such as bleeding, alongside the illness.
You may also see it called anaemia of inflammation on a report. Both names mean the same thing.Where it comes from
Which illnesses can cause it?
Almost any illness that keeps the body inflamed for weeks or months can do it. These are the ones doctors see most often.
Joint and immune conditions
Rheumatoid arthritis, lupus and inflammatory bowel disease keep the immune system switched on. The count often improves when the condition is under control.
Long-lasting infections
Tuberculosis, HIV, bone infections and slow-healing wounds are common causes in India. Treating the infection is the main way the count recovers.
Kidney disease
Damaged kidneys make less erythropoietin, the hormone that drives red cell making. This adds to the inflammation effect, so the drop can be larger.
Kidney disease is usually looked after by a kidney specialist alongside the haematologist.Cancer and blood cancers
Solid cancers, lymphoma and myeloma all trigger inflammation. Cancer treatment such as chemotherapy can lower the count further.
Also seen with
- Heart failure
- Long-standing diabetes
- Older age with several illnesses
Not sure whether this applies to you?
Ask an oncologistOn your report
What does the blood report usually show?
- Haemoglobin
- Low, usually by a modest amount. Reference ranges differ between laboratories, so compare with the range printed on your own report.
- MCV (red cell size)
- Usually normal. It can be slightly small when the illness has gone on for a long time.
- Serum iron
- Low, because iron is held in storage rather than circulating.
- Ferritin (iron stores)
- Normal or high. Ferritin also rises with inflammation, so a normal value does not fully rule out low iron.
- TIBC or transferrin
- Normal or low. In plain iron shortage it is usually high, which helps tell the two apart.
- CRP or ESR
- Often raised. These are markers of inflammation somewhere in the body.
Side by side
How is it different from plain iron shortage?
Chronic disease
Plain iron shortage
Iron stores normal or full, but locked away
Iron stores empty
Ferritin normal or high
Ferritin low
Iron tablets often do little on their own
Iron usually raises the count once blood loss is dealt with
Improves when the illness is controlled
Improves when the cause of iron loss is found and treated
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What doctors do
How is it treated?
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Treat the illness underneath
This is the main treatment. Controlling arthritis, clearing an infection or treating a cancer is often what lets the count rise.
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Check for a second cause
Many people have both chronic disease and true iron shortage, or low B12. The doctor looks for these, because each has its own fix.
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Iron through a drip, in some people
Because the gut blocks iron, tablets may not work. Iron given into a vein can help selected patients, particularly with kidney disease or cancer. It does not suit someone whose iron stores are already overloaded.
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Injections that push the marrow
Medicines that copy erythropoietin are used mainly in kidney disease and in some people having chemotherapy. They carry risks such as clots, so they are not offered to everyone.
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A blood transfusion, if the count is very low
Kept for a severe drop or troubling symptoms. It lifts the count quickly but does not fix the cause.
Commonly believed
What do people often misunderstand about it?
"Low haemoglobin always means low iron."
Not in this condition. The iron is there but locked away. Taking more iron without tests can miss the real cause and, in some people, add iron the body cannot use.
"Eating more greens and dates will fix it."
A good diet supports recovery. It cannot unlock iron that inflammation is holding back. The count usually improves when the illness itself is brought under control.
"Normal ferritin means nothing is wrong with my iron."
Ferritin rises with inflammation. A normal result can hide a real iron shortage underneath. Your doctor reads it with the other iron tests and the inflammation markers.
"If my count is low, my illness must be getting worse."
Sometimes it is a sign of active illness, but not always. Bleeding, low vitamins and some medicines also lower it. Ask your doctor to look at the trend and the other results together.
Being straight with you
What should you do next, and what can this page not tell you?
This page cannot tell you whether your own low haemoglobin comes from chronic disease. The pattern on the report points that way, but only your doctor can put it together with your illness, your symptoms and repeat tests.
It is often a diagnosis of exclusion
That means doctors first rule out other causes, such as bleeding, low B12 or folate, and problems in the bone marrow. If you are an older adult, if your count is falling, or if your white cells or platelets are also out of range, expect more tests before anyone settles on chronic disease as the whole answer.
When to see a haematologist
Ask for a blood specialist if the cause is unclear, if treatment of the illness has not helped the count, or if you are being considered for iron through a drip or marrow-stimulating injections. At CION, the haematology team reviews every report together and works with your other specialists, so the plan fits the illness you already live with.
Do not start, stop or change any medicine for your illness because of this result. Ask the doctor who treats it.Questions we are asked
Common questions about low haemoglobin of chronic disease
Is low haemoglobin of chronic disease dangerous?
It is usually mild and comes on slowly, so it is rarely dangerous on its own. It does add to tiredness and breathlessness, and it can strain a weak heart. It also tells your doctor the illness underneath is active. Reference ranges differ between laboratories, so read your result against your own report.
Why did iron tablets not raise my haemoglobin?
Inflammation raises a hormone that blocks iron from being absorbed in the gut and released from storage. So tablets often pass through without reaching the marrow. Your doctor may check whether you also have true iron shortage and decide whether iron given into a vein is worth trying.
My ferritin is high but haemoglobin is low. What does it mean?
This pattern often fits chronic disease, because ferritin rises with inflammation and iron is held in storage. It can also be seen with liver disease, heavy alcohol use and iron overload. Your doctor reads it with serum iron, transferrin, CRP and your history before drawing a conclusion.
Can it happen with diabetes or high blood pressure?
Yes, especially once these have affected the kidneys. Kidney damage lowers the hormone that drives red cell making. Long-standing diabetes also adds low-grade inflammation. A simple kidney function test is usually part of the work-up when someone with diabetes has a low haemoglobin.
Does cancer cause this kind of low haemoglobin?
It can. Cancers and blood cancers create inflammation, and chemotherapy or radiotherapy can lower the count further. In someone with cancer the team also checks for bleeding, marrow involvement and low vitamins, because more than one cause is common. Treatment is planned around the cancer care you are having.
Will I need a blood transfusion?
Most people do not. The count is usually mild and improves as the illness is controlled. A transfusion is considered when the count is very low or you have symptoms such as chest pain or breathlessness at rest. It works quickly but does not treat the cause, and your treating team decides.
How long does it take for the count to recover?
It depends on how quickly the illness underneath settles. When an infection clears or arthritis is controlled, the count often rises slowly over the following weeks to months. This page cannot give you a timeline for your own case. Repeat blood tests show whether it is moving in the right direction.
Should I see a haematologist or my regular doctor?
Start with the doctor who treats your illness. Ask for a haematologist if the cause is unclear, the count keeps falling, iron has not helped, or other blood counts are abnormal. Bring every blood report in date order and the list of all medicines you take.
Your Haematologist
Meet CION's haematologist. One specialist for your blood report and your plan.
Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Where to find us
Our centres in and around Hyderabad
Addressed by landmark, because that is how this city navigates. A haematology consultation can be booked at any of these centres through one helpline, and your team will tell you where each test or treatment takes place.
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Sources
- American Society of Hematology — Anemia
- National Heart, Lung, and Blood Institute — Anemia
- NHS — Iron deficiency anaemia
- NICE — Chronic kidney disease: assessment and management (NG203)
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
When iron tablets do not raise the countOther reasons iron may not be workingWhich tests find the cause of low haemoglobinWhat ferritin, iron and B12 tests are looking forLow haemoglobin in older adultsWhy several causes often overlap after sixtyBlood counts during chemotherapyHow cancer treatment affects haemoglobin
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