Iron Deficiency: Early Signs, Causes, Diagnosis, & Treatment

In today’s fast-paced world, it’s easy to blame tiredness on lack of sleep, stress, or endless to-do lists. But for many Malaysians, fatigue has a deeper cause, iron deficiency or anaemia.

What is Iron Deficiency, and the Common Types of Anaemia?

Iron deficiency happens when your body doesn’t have enough iron to support healthy blood and energy production. In Malaysia, it’s surprisingly common: 1 in 7 premenopausal women have low iron stores, while men rarely experience it unless linked to medical issues. Left unchecked, this condition can silently erode your health and quality of life. The common types of anaemia include vitamin B12-deficiency anaemia, and hemolytic anaemia.

Vitamin B12-Deficiency or Folate Deficiency Anaemia

Vitamin B12 or folate (Vitamin B9) deficiency anaemia occurs when these necessary vitamins are insufficient, resulting in the formation of big, immature red blood cells. These unusually large red blood cells cannot function properly, affecting the body's ability to carry oxygen, resulting in symptoms such as weariness and weakness.

Hemolytic Anaemia

Hemolytic anaemia develops when the body's red blood cells are destroyed quicker than they are produced. This quick death causes a scarcity of healthy red blood cells, which impairs the body's ability to transport oxygen. Common reasons include autoimmune illnesses, infections, and hereditary problems like sickle cell disease.

Let’s take a closer look at the signs, causes, and solutions, so you can recognise it early and take control of your well-being.

Early Signs You Might Be Low on Iron

Iron deficiency often hides in plain sight. In the early stages, symptoms may feel like everyday fatigue or stress. But pay attention, your body might be sending signals.

In adults, warning signs include:

• Persistent tiredness and low energy
• Poor concentration and brain fog
• Shortness of breath or reduced stamina
• Heart palpitations
• Restless legs at night
• Brittle nails, hair thinning, or cracks at the corners of the mouth

In children, it can be trickier to spot. Teachers or parents may notice poor exercise tolerance, fainting during activity, or unusual food cravings (like ice, chalk, or clay), a condition called pica.

Because these symptoms are often brushed off as “normal,” many people don’t realise they’re iron deficient until the condition worsens.

Additionally, common symptoms from vitamin B12-deficiency anaemia, and hemolytic anaemia include:

Symptoms of Vitamin B12 or Folate Deficiency

• Extreme tiredness and lack of energy
• Pins and needles or numbness
• Sore, red tongue
• Mouth ulcers
• Muscle weakness
• Vision problems
• Psychological issues such as depression, anxiety, confusion, or even dementia
• Memory, understanding, and judgment difficulties

Symptoms of Hemolytic Anaemia

• Fatigue and weakness
• Pale or jaundiced (yellow) skin
• Shortness of breath
• Rapid heart rate
• Dark urine (due to broken-down red blood cells)
• Enlarged spleen or liver
• Dizziness or lightheadedness

Risk Factors and Causes

So who’s most at risk? The answer depends on age, gender, and health conditions.

• Women of Reproductive Age: Menstrual bleeding is the number one cause of iron deficiency in Malaysia. If blood loss is heavy, it can outweigh dietary intake.
• Men and Post-Menopausal Women: For these groups, iron deficiency is a red flag, usually pointing to blood loss from the gut. In such cases, doctors often recommend endoscopy to check for hidden causes.
• Post-Surgery Patients: Those who have undergone bariatric (weight loss) surgery may struggle with iron absorption, leading to long-term deficiencies.

In short, for women, heavy periods are the most common culprit. For men, it’s almost always a sign of something more serious.

Furthermore, anaemia can be caused by a variety of factors depending on the type.

Vitamin B12 and Folate Deficiency Anaemia Causes

• Pernicious Anaemia: The immune system attacks stomach cells, preventing the absorption of vitamin B12 from food. This is the most common cause of vitamin B12 deficiency.
• Dietary Deficiencies: A lack of vitamin B12 or folate in the diet, particularly in vegans who don't take supplements or eat fortified foods, or due to long-term poor or restrictive diets.
• Medications: Certain drugs, such as anticonvulsants and proton pump inhibitors (PPIs), can interfere with the absorption of these vitamins.
• Age: Older adults are more prone to B12 and folate deficiencies, with around 1 in 10 people over 75 affected.

Hemolytic Anaemia Causes

• Premature Red Blood Cell Destruction: Caused by autoimmune diseases, infections, or inherited conditions such as sickle cell disease.
• Medications: Some medications, like antibiotics and antimalarials, can trigger hemolysis (destruction of red blood cells).
• Infections: Certain infections like malaria or parvovirus can lead to the premature destruction of red blood cells.

Long-Term Impact of Iron Deficiency

Untreated iron deficiency doesn’t just sap your energy, it can reshape your life.

Over time, it leads to:

• Constant fatigue and reduced productivity
• Difficulty exercising or focusing
• Anaemia (low haemoglobin levels), which can become severe
• In rare cases, heart failure if Anaemia is left unchecked
• In pregnant mothers, severe Anaemia may affect fetal growth

The good news? These consequences are largely preventable if iron deficiency is recognised and treated early.

How Iron Deficiency is Diagnosed

Think you might be iron deficient? The only way to know for sure is through proper testing.

Early detection:

• Blood tests like Serum Ferritin or Transferrin Saturation (TSAT) measure your iron stores accurately.
• A simple serum iron test isn’t reliable on its own.

When Anaemia develops:

• Haemoglobin levels fall: less than 13 g/dL signals Anaemia.
• Other clues may show up too, like a low red cell haemoglobin content (MCH < 27 pg) or mildly increased platelet counts.

By catching deficiency before Anaemia sets in, you can start treatment early and avoid complications.

Other tests might be necessary if the cause of iron deficiency anaemia is unknown, including:

• Endoscopy, or Colonoscopy: To identify the bleeding sources or gastrointestinal conditions.
• Stool Occult Blood Test: To check for hidden blood loss in the gastrointestinal tract.
• Celiac Disease Screening: Might be necessary if poor absorption is suspected.
• Bone Marrow Biopsy: May be done to evaluate the iron stores in the bone marrow under rare circumstances where the diagnosis is unclear.

Taking Action: Prevention and Treatment

Here’s the reassuring part: iron deficiency can always be corrected.

• Supplements: Iron tablets or injections replenish stores, but consistency is key.
• Addressing the cause: For women, managing heavy menstrual bleeding helps prevent recurrence. For men and post-menopausal women, doctors investigate and treat hidden sources of blood loss.
• Lifestyle: Recognising the signs early and getting tested regularly if you’re at risk is the best prevention strategy.

Recovery times vary, sometimes weeks, sometimes months, but steady treatment restores energy and prevents relapse.

When Should You See a Doctor?

Seek medical advice if you or your child experience:

• Persistent fatigue, shortness of breath, or frequent dizziness
• Blue lips, pale skin, or fainting spells
• Heavy menstrual bleeding or unexplained blood loss
• Unusual food cravings or restless legs syndrome

Schedule an Appointment for Anaemia Treatment at Gleneagles Hospital Kuala Lumpur

Iron deficiency is common, correctable, and often overlooked. For premenopausal women, it’s one of the most frequent health issues; for men, it signals something that should never be ignored.

The earlier it’s detected, the easier it is to treat. If you suspect iron deficiency, speak to your Doctor and request the right tests. With timely care, you can restore your strength, focus, and quality of life.

Get in touch with us to book an appointment with haematologists at Gleneagles Hospital Kuala Lumpur today. We assure you the best possible care tailored to your specific needs.

Dr. Jay Suriar

Consultant Haematologist

Gleneagles Hospital Kuala Lumpur