How Mould Affects Eczema – The Hidden Trigger in Your Home

When you think about eczema triggers, you probably think of allergens, stress, or skincare products. But there’s one sneaky culprit that often hides in your home and quietly worsens your symptoms: mould.

Mould is more than just an eyesore—it’s a serious irritant for those with eczema and other skin sensitivities. Here’s what you need to know about how mould affects eczema, and how to protect your skin (and home).

What Is Mould?

Mould is a type of fungus that thrives in damp, humid environments. You’ll often find it in bathrooms, kitchens, around windows, or in areas with poor ventilation. It releases spores into the air, which can trigger a range of allergic reactions—including skin inflammation.

How Mould Affects People With Eczema

For people with eczema, exposure to mould can:

Trigger flare-ups – The body may react to mould spores as if they’re allergens, causing a reaction in the skin.

Worsen itching and redness – Airborne spores can land on the skin and increase irritation.

Weaken the skin barrier – Constant exposure to mould and its toxins can leave the skin more vulnerable.

Increase sensitivity – Your skin may react more intensely to other irritants when mould is present.

Those with atopic eczema are particularly sensitive, especially if they also suffer from asthma or hay fever—conditions often linked with mould sensitivity.

Signs Mould Might Be Affecting Your Eczema

You notice eczema flaring up when you’re at home (especially in damp rooms)
Your skin improves when you spend time away from home
You see or smell mould in your house (musty, earthy scent)
You have other allergy-like symptoms: sneezing, coughing, or watery eyes

How to Reduce Mould and Protect Your Skin

Ventilate regularly – Open windows or use extractor fans in the bathroom and kitchen
Use a dehumidifier – Especially in damp rooms or homes prone to condensation
Fix leaks quickly – Don’t let damp patches sit—mould grows fast
Clean with mould-killing solutions – Vinegar or specialised mould sprays work well (always wear gloves and a mask when cleaning mould)
Avoid drying clothes indoors – It increases moisture in the air

Use anti-mould paint – Especially in problem areas like bathrooms

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Don’t Forget Your Bedding & Clothes

Mould can also cling to damp towels, mattresses, and wardrobes. Make sure to:

Wash bedding regularly in hot water
Dry clothes completely before putting them away
Keep wardrobes dry and ventilated

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Final Thoughts

Mould is more than just a household nuisance—it’s a hidden eczema trigger that can make life uncomfortable if left unchecked. By taking steps to reduce moisture and keep your home mould-free, you’re also giving your skin a better chance to stay calm and flare-free.