Is the black mould on my bedroom wall making us sick?

If you've noticed black mould in a room where your family sleeps, worrying about it is completely reasonable. Here's the honest answer: health authorities do link indoor damp and mould to respiratory symptoms, and children and sensitive people are more affected — but this is general information, not a diagnosis. Removing the growth and drying the room out are the right first steps, and a GP is the right person for any symptoms.

Can black mould on a bedroom wall actually make you sick?

It can contribute to symptoms, particularly with ongoing exposure. Australian health authorities and the World Health Organization link living with indoor damp and mould to respiratory irritation — coughing, wheezing, a blocked or runny nose, throat and eye irritation, and worsened asthma. The strength of the effect depends on how much mould there is, how long people are exposed, and how sensitive they are. What matters for a worried parent is that this is a recognised, documented association, not something you're imagining — and also that it's a general population finding, not a diagnosis of anyone in your home. If a member of your household has a persistent cough, congestion or breathing trouble, that's a conversation for a GP, who can look at the whole picture. This article is about the wall, not medical advice.

Which symptoms are linked to indoor mould?

The commonly reported ones are respiratory and allergic: sneezing, a runny or blocked nose, itchy or watering eyes, coughing, wheezing and, in people with asthma, more frequent flare-ups. Some people notice symptoms ease when they're out of the house and return at home — a pattern worth mentioning to a doctor. It's important to be precise here, because there's a lot of fear-driven marketing about mould: the well-supported links are to these irritation and allergy-type symptoms and to asthma aggravation. Our cleaning products remove mould from surfaces and clean the room; they do not treat, cure or prevent any illness, and no honest cleaner should claim to. If you're weighing up how serious your situation is, the right expert is a GP, not a spray bottle.

Who in the house is most at risk?

Sensitivity isn't evenly spread. Babies and young children, older adults, people with asthma, eczema or allergies, and anyone whose immune system is compromised tend to react more to indoor mould. That's why a mouldy child's bedroom or nursery understandably feels more urgent than a spot in the garage — and acting sooner is sensible. It also shapes how you clean: in a room where a baby sleeps, you don't want to swap a mould problem for a lingering-chlorine problem. A bleach-free, fume-free approach lets you deal with the growth without filling the room with something else the same sensitive lungs then have to breathe. If symptoms are already present, clean the room and see a GP — the two aren't alternatives.

What should I actually do right now?

You have more control than the worry suggests. First, remove the visible mould from the painted wall or ceiling. Second, deal with the cause so it doesn't simply regrow: wipe up condensation on cold mornings, run the extractor fan or open a window when showering or drying clothes indoors, pull beds and wardrobes a few centimetres off external walls so air can move, and watch the humidity. Third, if anyone has symptoms, book a GP visit and mention the mould. This is the difference between panic and agency: you can't control every spore in the air, but you can remove what's on the wall and change the damp, still conditions that let it settle. For the recurrence side of this, see why does mould keep coming back on the same wall?

How do I remove it safely without adding fumes?

On painted bedroom walls, ceilings and painted timber, spray the All Natural Mould Remover Wall Cleaner directly onto the mould and wipe it off immediately with a damp cloth. It's bleach-free, pet and child safe and paint safe, and it removes mould on contact rather than being left to sit. The active ingredients are citric acid, which strips the surface minerals mould relies on, and pure clove oil, a documented natural antifungal whose main compound eugenol (about 85% of the oil) disrupts fungal cell membranes (Pinto et al., 2009, Journal of Medical Microbiology). The eucalyptus oil replaces that musty smell with a sharp, clean scent. A recurring note in the product's reviews (4.9 stars from 49 customers) is parents being glad they didn't have to move a child out of the room to clean it.

I'm Tony Taig, fifth generation in a family that has distilled eucalyptus oil in Australia since 1895. No law has ever required us to disclose what goes into our cleaners — we list all five ingredients anyway, because "what am I breathing in my kid's room" is exactly the question I'd be asking too.

Frequently asked questions

Can black mould on a bedroom wall make my family sick?

Health authorities link indoor damp and mould to respiratory symptoms such as coughing, wheezing, a blocked or runny nose and aggravated asthma, especially with prolonged exposure. This is general information, not a diagnosis — if someone has ongoing symptoms, see a GP.

Who is most affected by indoor mould?

Babies and young children, older adults, people with asthma or allergies, and anyone with a weakened immune system tend to be more sensitive. In a child's bedroom it's worth acting sooner rather than later.

What should I do about mould in a bedroom right now?

Remove the visible growth from painted surfaces, then reduce the damp and still air that caused it — ventilate, manage condensation, and move furniture off cold walls. See a GP about any health symptoms.

How do I clean it without adding fumes to the room?

Use a bleach-free, fume-free cleaner you wipe off immediately, rather than leaving a chlorine product to sit in a room where people sleep.

Related reading: how to get black mould off a wall without bleach, is bleach safe to use around children and pets indoors?, and why mould keeps coming back.

General information only, not medical advice. For any health concern, consult a GP. Reference: Pinto E. et al. (2009), Journal of Medical Microbiology, 58(11), 1454–1462; indoor damp/mould and respiratory health per World Health Organization guidance.