Mould is one of those things most people don’t think about until it becomes visible.
But by the time you can see it, it’s often already been there for a while.
With humid conditions, heavy rain, or poor ventilation, mould can develop quickly, especially in areas that aren’t regularly opened or exposed to airflow.
And while it’s often treated as a surface issue, it can also affect how you feel day to day.
Why mould develops in the first place
Mould thrives in damp, enclosed environments.
That can include wardrobes, bathrooms, ceilings, or any space where moisture builds up and doesn’t dry out properly.
“Mould needs moisture to grow,” explains Madeline Calfas, registered nurse and nutritionist. “So the first step is always identifying where that moisture is coming from.”
This could be due to humidity, leaks, poor drainage, or even just lack of ventilation in certain parts of the home.
How it can affect your health
Exposure to mould doesn’t impact everyone the same way, but it can contribute to a range of symptoms, particularly when exposure is ongoing.
“In the short term, people might notice things like sinus congestion, headaches, fatigue, or skin irritation,” says Madeline. “It can also affect concentration and general energy levels.”
For some, it presents more like allergy-type symptoms such as a runny nose, watery eyes, or throat irritation.
Longer-term exposure can place additional stress on the body, particularly if it’s not addressed.
“It’s not something you want to ignore if symptoms are persistent,” Madeline explains. “Especially if they improve when you’re away from the environment.”
Where mould is often found
Mould isn’t always obvious.
It tends to develop in areas that are:
- Poorly ventilated
- Frequently exposed to moisture
- Not regularly checked or cleaned
Wardrobes, behind furniture, ceilings, and inside walls are common problem areas.
“If you can smell it or see it, it’s already established,” says Madeline. “That’s when it needs to be dealt with properly.”
Removing mould the right way
Cleaning mould isn’t just about wiping it away.
If handled incorrectly, it can spread spores into the air and worsen the issue.
“It’s important to approach it carefully,” Madeline says. “In some cases, especially if it’s extensive, professional removal is the safest option.”
For smaller areas, appropriate cleaning methods and protective measures, like gloves and masks, are recommended.
Harsh chemicals aren’t always necessary, and in some cases, can be less effective than expected.
Preventing it from coming back
Prevention comes down to controlling moisture.
This includes:
- Keeping spaces well ventilated
- Using air conditioning or dehumidifiers where needed
- Opening windows regularly
- Checking for leaks or water damage
“It’s about creating an environment where mould can’t grow,” Madeline explains. “If the moisture is still there, the mould will come back.”
Regular checks in areas prone to dampness can also help catch it early.
When to look beyond the home
If symptoms persist even after mould has been removed, it may be worth looking at overall health support.
That doesn’t mean jumping straight to extreme measures, but understanding how your body is responding.
“Everyone reacts differently,” says Madeline. “If exposure has been ongoing, supporting the body properly can help with recovery.”
This is where a more individual approach becomes important.
What to take from it
Mould is common, but that doesn’t mean it should be ignored.
Addressing it early, managing moisture, and being aware of how your environment affects your health can make a significant difference.
“It’s not just about cleaning what you can see,” Madeline says. “It’s about understanding why it’s there in the first place.”
Because once that’s addressed, it becomes much easier to keep it from returning.
