What Does Anaemia Mean?
Quick facts: Anaemia is not a single condition but a broad term used to describe a range of disorders that affect the blood’s ability to carry oxygen around the body. While iron deficiency anaemia is the most common form, other types include pernicious anaemia, folate deficiency anaemia, sickle cell anaemia and aplastic anaemia. Understanding the different causes of anaemia can help ensure the right diagnosis and treatment are received.
Some conditions are better known than others. When people hear the word ‘anaemia’, they often think of iron deficiency – but they’re not actually the same condition. While iron deficiency anaemia is common, it’s only one of several forms of anaemia that can affect the body.1
Many different conditions can lead to anaemia, and although they may share similar symptoms, their causes and treatments can vary considerably. For this reason, understanding what anaemia actually means is important. A proper diagnosis can help healthcare professionals to identify the underlying cause and recommend the most appropriate treatment to relieve your symptoms.2
What Does the Term Anaemia Mean?
Anaemia is an umbrella term for a variety of conditions in which the body doesn’t have enough healthy red blood cells or haemoglobin to transport oxygen efficiently around the body.1
Haemoglobin is a protein found within red blood cells that binds to oxygen in the lungs and carries it to tissues and organs. When haemoglobin levels become too low, or when there aren’t enough healthy red blood cells available, less oxygen reaches the body’s tissues. This can lead to symptoms such as:
- Fatigue
- Weakness
- Shortness of breath
- Dizziness
- Difficulty concentrating.2
It might be helpful to think of anaemia as a symptom rather than a condition in its own right. Anaemia always refers to a situation where something is affecting the production, survival or function of red blood cells – but several conditions can do that. Identifying that underlying cause is therefore a key part of diagnosis and treatment.
How Many Types of Anaemia Are There?
As mentioned, there are several different types of anaemia, each with its own causes and treatment approaches. Some develop because the body lacks essential nutrients needed to produce red blood cells, while others are linked to inherited conditions, autoimmune diseases or problems affecting the bone marrow..3
Because symptoms can overlap between different forms of anaemia, it’s crucial not to self-diagnose or self-medicate. A healthcare professional can perform tests to determine the specific cause of your symptoms and recommend suitable treatment.
Below are a range of anaemia-related conditions.
Iron Deficiency Anaemia
Iron deficiency anaemia is the most common form of anaemia worldwide. It refers to anaemia caused by low iron levels, as iron is one of the key building blocks in haemoglobin.1
Potential causes include:
- Inadequate dietary iron intake
- Increased iron requirements during pregnancy
- Blood loss
- Conditions that affect iron absorption.
Common symptoms may include fatigue, weakness, pale skin and shortness of breath, while treatment usually involves iron supplementation.
Pernicious Anaemia
Pernicious anaemia is a form of vitamin B12 deficiency anaemia caused by an autoimmune condition that affects the body’s ability to absorb vitamin B12.4
The condition occurs when the immune system damages cells in the stomach responsible for producing intrinsic factor, a protein needed for vitamin B12 absorption. Without sufficient vitamin B12, healthy red blood cell production becomes impaired.
Generally, vitamin B12 supplementation forms a key part of treatment for this condition.
Folate Deficiency Anaemia
Folate deficiency anaemia develops when the body doesn’t have enough folate (vitamin B9) to produce healthy red blood cells.5
Possible causes include:
- Inadequate dietary intake
- Certain digestive disorders
- Increased requirements during pregnancy
- Some medications.
As with other forms of anaemia, symptoms often include tiredness, weakness and reduced energy levels.
Sickle Cell Anaemia
Sickle cell anaemia is an hereditary blood disorder that causes red blood cells to be misshapen, affecting their ability to function as normal.6
Usually flexible and round, red blood cells need this shape to allow them to carry oxygen through the blood. With sickle cell anaemia, the red blood cells become crescent or sickle-shaped and rigid – so oxygen can’t be transported as easily.
Abnormal red blood cells such as these can break down more quickly and may block blood vessels, leading to complications including pain episodes and reduced oxygen delivery throughout the body.
Haemolytic Anaemia
Haemolytic anaemia occurs when red blood cells are destroyed faster than the body can replace them, leading to overall reduced levels.7
This may result from:
- Inherited conditions
- Autoimmune disorders
- Infections
- Certain medications
- Other underlying health problems.
The severity can vary significantly depending on the cause.
Aplastic Anaemia
Aplastic anaemia is a rare condition in which the bone marrow doesn’t produce enough new blood cells.8
The condition may develop due to:
- Autoimmune disorders
- Exposure to certain chemicals
- Infections
- Medications
- Other unidentified causes.
Because it affects blood cell production, aplastic anaemia can increase the risk of fatigue, infections and bleeding problems.
Anaemia Caused by Other Conditions
Anaemia can also develop as a result of other chronic health conditions. Chronic kidney disease, inflammatory disorders, cancer and some long-term infections can affect the body’s ability to produce healthy red blood cells.9
In these cases, managing the underlying condition is often an important part of treating the anaemia.
Conclusion
Anaemia is an umbrella term that describes several conditions affecting red blood cells and haemoglobin. While iron deficiency anaemia is the most widely recognised form, other types – including pernicious anaemia, folate deficiency anaemia, sickle cell anaemia and aplastic anaemia – can also occur.
Because symptoms often overlap, getting an accurate diagnosis is essential. Anyone experiencing persistent symptoms such as fatigue, weakness, dizziness or shortness of breath should seek advice from a healthcare professional rather than attempting to self-diagnose or self-treat.
FAQs
Is Anaemia Dangerous?
Anaemia can range from mild to severe depending on the cause and how quickly it develops.
Mild cases may cause relatively minor symptoms, while more severe or untreated anaemia can affect quality of life and, in some cases, lead to complications involving the heart, nervous system or other organs.2
The level of risk depends largely on the underlying cause, which is why medical assessment is important whenever symptoms are persistent.
Is Anaemia Curable?
Some forms of anaemia can be corrected when the underlying cause is identified and treated appropriately. For example, iron deficiency anaemia may improve when iron levels are restored, while vitamin B12 or folate deficiency anaemia may respond to supplementation under medical supervision.1,4
Other inherited forms, such as sickle cell anaemia, generally require ongoing management rather than a cure.
What Is the Most Common Type of Anaemia?
Iron deficiency anaemia is the most common type of anaemia worldwide.1
It develops when the body doesn’t have enough iron to produce the right amount of haemoglobin for healthy red blood cell production. Common causes include inadequate dietary intake, blood loss and increased iron requirements during certain life stages.
References
(1) NHS. (2024). Iron deficiency anaemia. Retrieved from: https://www.nhs.uk/conditions/iron-deficiency-anaemia/
(2) NHS. (2024). Anaemia. Retrieved from: https://www.nhs.uk/conditions/anaemia/
(3) National Heart, Lung, and Blood Institute. (2024). Anemia. Retrieved from: https://www.nhlbi.nih.gov/health/anemia
(4) NHS. (2024). Vitamin B12 or folate deficiency anaemia. Retrieved from: https://www.nhs.uk/conditions/vitamin-b12-or-folate-deficiency-anaemia/
(5) MedlinePlus. (2024). Folate-deficiency anemia. Retrieved from: https://medlineplus.gov/ency/article/000354.htm
(6) NHS. (2024). Sickle cell disease. Retrieved from: https://www.nhs.uk/conditions/sickle-cell-disease/
(7) Cleveland Clinic. (2024). Hemolytic Anemia. Retrieved from: https://my.clevelandclinic.org/health/diseases/22479-hemolytic-anemia
(8) NHS. (2024). Aplastic anaemia. Retrieved from: https://www.nhs.uk/conditions/aplastic-anaemia/
(9) National Kidney Foundation. (2024). Anemia and Chronic Kidney Disease. Retrieved from: https://www.kidney.org/kidney-topics/anemia-and-chronic-kidney-disease
