Understanding Mould and Its Effects on the Human Body

What Is Mould and Why Should You Care?

Mould is a type of fungus that thrives in moist, humid environments, commonly appearing in homes after water damage, condensation build-up, or poor ventilation. While many think of it as merely a cosmetic nuisance, mould can pose serious health risks, especially when left untreated.

Mould spreads via microscopic spores that float through the air and settle on damp surfaces, rapidly forming visible colonies. It can grow on walls, ceilings, carpets, insulation, wood, and even clothing—virtually any organic material.

Although not all mould is toxic, many types can produce allergens, irritants, or even mycotoxins—substances that can affect the body in subtle or severe ways.

In this blog, we explore the health implications of mould exposure and why early detection and professional removal are so important.

Common Symptoms of Mould Exposure

Exposure to mould can affect people differently, depending on their health, age, and immune system strength. Symptoms are often mistaken for common illnesses or allergies.

Short-Term Symptoms May Include:

• Sneezing, coughing, and nasal congestion

• Red, itchy, or watery eyes

• Skin irritation or rashes

• Headaches or dizziness

• Sore throat or sinus issues

• Increased asthma symptoms or tightness in the chest

These issues are typically caused by inhaling mould spores, especially in confined or poorly ventilated indoor spaces. The longer the exposure, the more likely symptoms will worsen.

Who’s Most at Risk?

While mould can affect anyone, certain groups are more vulnerable to its effects:

Higher-Risk Individuals Include:

• Children and infants: Their lungs and immune systems are still developing.

• Elderly individuals: Weakened immunity and respiratory conditions increase sensitivity.

• People with asthma or allergies: Mould can significantly aggravate symptoms.

• Immunocompromised individuals: Those undergoing chemotherapy, organ transplants, or managing chronic illnesses may experience severe complications.

• Pregnant women: Prolonged exposure may have indirect effects on unborn children.

For these individuals, even low-level exposure can lead to serious respiratory distress or

longer-term health concerns.

Mycotoxins and Long-Term Health Effects

Some types of mould, particularly black mould (Stachybotrys chartarum), produce

mycotoxins, which are toxic compounds that can cause more serious effects.

Potential Long-Term Health Effects Include:

• Chronic fatigue

• Memory loss or cognitive issues ("brain fog")

• Respiratory infections or chronic bronchitis

• Neurological symptoms

• Immune system suppression

While research is ongoing, many case studies suggest a link between prolonged mould exposure and neurological or autoimmune disorders, especially in environments where mould was left unchecked for months or years.

What You Can Do – Prevention and Professional Help

The best way to deal with mould is to prevent it in the first place:

Prevention Tips:

• Keep humidity levels below 60% using dehumidifiers or ventilation.

• Fix leaks and water damage immediately.

• Ensure bathrooms and kitchens are well-ventilated.

• Use mould-resistant materials in damp-prone areas.

However, once mould appears—especially if it's spread over a large area or caused by water damage—it’s crucial to call certified mould remediation professionals.

At Biodec, our technicians are IICRC-trained and follow strict safety protocols to identify, isolate, and eliminate mould, restoring safe living conditions for you and your family.