Introduction

Anaemia is a condition where your blood lacks enough healthy red blood cells to carry adequate oxygen to your body’s tissues. Understanding “what anaemia is” is crucial for recognising its impact on energy and overall health.

To define “anaemic” simply means having too few healthy red blood cells to carry enough oxygen to your body’s tissues, often resulting in fatigue, weakness and other related symptoms.

The good news is that with early diagnosis and the right care, most anaemia cases are treatable, allowing people to regain energy and improve their quality of life.

If you suspect you have unexplained fatigue, paleness or other signs of a lack of iron, know that help is here for you.

Signs & Symptoms

Spotting anaemia symptoms early can make a big difference in seeking timely help.

These symptoms result from your body not getting enough oxygen.

Common signs and symptoms of anaemia include:

Low iron symptoms in females might also include heavy menstrual bleeding.

Understanding symptoms of anaemia and what deficiency means can help you act sooner. If you notice these signs, talk to your specialist.

Causes & Risk Factors

What causes anaemia is fundamentally a problem with your red blood cells.

Key reasons for low haemoglobin:

  • Iron deficiency: The most common cause of low red blood cells. This is when your body lacks enough iron to produce haemoglobin.

    This can be due to:
    • Blood loss: Heavy menstrual periods, gastrointestinal bleeding (ulcers, colon polyps, cancer), or internal bleeding
    • Poor iron absorption: Conditions like celiac disease or Crohn’s disease
    • Insufficient dietary iron intake: Not consuming enough iron-rich food sources

  • Vitamin deficiencies: Lack of Vitamin B12 and folate, which are essential for red blood cell production

  • Chronic diseases: Conditions like kidney disease, cancer, Crohn’s disease or rheumatoid arthritis can interfere with red blood cell production (anaemia of chronic disease).

  • Bone marrow diseases: Disorders affecting the bone marrow’s ability to produce blood cells (e.g., leukaemia, aplastic anaemia)

  • Hemolysis: Red blood cells are destroyed faster than they can be made (e.g., sickle cell anaemia, thalassemia)

  • Genetic factors: Inherited conditions can affect red blood cell production or structure

Knowing the cause of low red blood cells helps you and your doctor find the right treatment plan for your anaemia.

Diagnosis

An accurate diagnosis will confirm if your red blood cells are low and determine the next steps for treatment.

  • Detailed medical history and symptom review: Your doctor will ask about signs of low haemoglobin, diet, menstrual history (for females) and any other relevant medical conditions.

  • Complete Blood Count (CBC): This is the primary test.

    It measures:
    • Haemoglobin: The amount of oxygen-carrying protein in your blood. Haemoglobin normal range is typically 12-16 g/dL for women and 13.5-17.5 g/dL for men, but can vary
    • Hematocrit: The percentage of red blood cells in your blood
    • Red Blood Cell Count (erythrocyte count): The number of red blood cells
    • Mean Corpuscular Volume (MCV): The average size of your red blood cells low MCV indicates small red blood cells, typical of iron deficiency anaemia

  • Blood smear: Examination of red blood cells under a microscope for shape, size and colour abnormalities

  • Iron studies: Measure iron levels, iron-binding capacity and ferritin (iron storage protein) to assess iron deficiency treatment needs

  • Vitamin B12 and Folate tests to check for deficiencies

  • Bone marrow biopsy: In some cases, to investigate bone marrow disorders

Types of Anaemia

There are multiple forms of anaemia, each with distinct causes, symptoms and treatment approaches. Understanding the kinds of anaemia is essential for accurate diagnosis and targeted care.

Most common types of anaemia:

1. Iron-Deficiency Anaemia

  • Cause: The most common form of anaemia, caused by a lack of iron, which is essential for producing haemoglobin — the protein that allows red blood cells to carry oxygen

  • Common triggers:
    • Blood loss (e.g., heavy menstrual periods, ulcers, gastrointestinal bleeding)
    • Poor iron intake through diet
    • Increased iron demand during pregnancy
    • Poor absorption (e.g., due to celiac disease or gastric bypass surgery)

  • Symptoms: Fatigue, pale skin, shortness of breath, dizziness, brittle nails and cold hands and feet

2. Vitamin Deficiency Anaemia

  • Cause: Occurs when the body lacks key vitamins needed for red blood cell production, especially vitamin B12 and folate (vitamin B9)

  • Common triggers:
    • Poor dietary intake
    • Digestive conditions affecting absorption (e.g., Crohn’s disease)
    • Pernicious anaemia — an autoimmune condition that interferes with B12 absorption
    • Alcohol abuse

  • Symptoms: Fatigue, tingling or numbness in the hands and feet, difficulty concentrating, memory problems, mood changes and a sore or swollen tongue

3. Anaemia of Chronic Disease

  • Cause: A result of long-term medical conditions that interfere with the body’s ability to produce healthy red blood cells

  • Common triggers:
    • Chronic infections or inflammation (e.g., tuberculosis, HIV, inflammatory bowel disease)
    • Autoimmune diseases (e.g., rheumatoid arthritis, lupus)
    • Chronic kidney disease or cancer

  • Symptoms: Generalised fatigue and weakness, often overlapping with symptoms of the underlying disease. May also include pale skin and reduced exercise tolerance

4. Aplastic Anaemia

  • Cause: A rare but serious condition where the bone marrow fails to produce sufficient red blood cells, white blood cells and platelets

  • Common triggers:
    • Autoimmune disorders
    • Exposure to radiation, chemotherapy, or toxic chemicals (e.g., benzene)
    • Viral infections (e.g., hepatitis, Epstein-Barr virus)
    • Inherited bone marrow failure syndromes

  • Symptoms: Persistent fatigue, frequent infections, easy bruising, unexplained bleeding, and pale skin

5. Hemolytic Anaemias

  • Cause: Occurs when red blood cells are destroyed (hemolysis) faster than the body can replace them. It can be inherited or acquired

  • Common triggers:
    • Genetic conditions such as sickle cell anaemia or thalassemia
    • Autoimmune disorders (autoimmune haemolytic anaemia)
    • Infections, certain medications, or reactions to blood transfusions

  • Examples:
    • Sickle Cell Anaemia: An inherited condition where red blood cells become crescent-shaped, making them prone to breaking and blocking blood flow
    • Thalassemia: A genetic disorder causing abnormal haemoglobin production, leading to fragile red cells and anaemia
    • Symptoms: Fatigue, jaundice (yellowing of the skin or eyes), dark-coloured urine, shortness of breath and an enlarged spleen

Knowing which type of anaemia you have is critical. Each form has a different underlying cause, which means treatment must be tailored, from iron or vitamin supplementation, to treating chronic conditions or even blood transfusions and bone marrow support.

Treatments

Treatment focuses on addressing the underlying cause of low red blood cells and restoring healthy blood cell levels.

Key treatment elements for anaemia:

When managed properly, people with anaemia can improve their energy levels and overall health.

Ready to learn what might help you? Learn more about anaemia treatments on this treatment page.

Complications

Without treatment, anaemia can lead to:

Understanding your condition and sticking to treatment can help prevent severe complications and manage anaemia symptoms.

Prevention

You can lower the risk of iron-deficiency and vitamin-deficiency anaemias by:

With the right precautions and awareness, many people can maintain healthy red blood cell counts.

Living with Anaemia

Living well means managing your condition day to day:

Navigating Anaemia in Singapore

The Problem and Types of Conditions

Anaemia is a common yet often overlooked health concern, affecting both children and adults. It occurs when the body has fewer healthy red blood cells or insufficient haemoglobin to carry oxygen. The most common type is iron-deficiency anaemia, but other forms such as vitamin B12 deficiency, folate deficiency, and anaemia linked to chronic illnesses or genetic conditions like thalassemia are also seen in the country. Recognising the type of anaemia is essential, as treatment approaches vary depending on the underlying cause.

Consultation to Ongoing Care

Managing anaemia in Singapore usually begins with a consultation and detailed blood tests to determine the type and severity. Specialists, such as haematologists or internal medicine doctors, may recommend dietary changes, supplements, or, in some cases, treatments like intravenous iron or blood transfusions.

For more complex cases, long-term monitoring and ongoing care are provided to ensure patients maintain stable blood levels and overall health. This step-by-step approach allows patients to understand what to expect from diagnosis through recovery and management.

When to Seek Help

You should seek medical attention for anaemia in Singapore if you experience persistent fatigue, shortness of breath, pale skin, or unusual weakness. Early detection not only prevents complications but also ensures appropriate treatment for the specific type of anaemia.

Consulting a healthcare professional promptly can help patients restore their energy levels, improve their quality of life, and address any underlying medical conditions.

Find an Anaemia Specialist in Singapore

You do not have to manage anaemia alone. A specialist can help assess your low red blood cell count, identify the specific forms of anaemia you have, adjust medication and provide dietary guidance.

If you or someone you love has unexplained fatigue, paleness or other signs, book a consultation to get clear answers.

Take the first step toward stable health and peace of mind.

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