How to Find and Treat Mould in Your Home

If you suspect mould at home, the goal is not to panic. The goal is to get practical.

Mould is usually a moisture problem first. If you do not address the moisture, mould tends to come back, no matter how good your cleaning routine is.

This guide covers how to find it, what you can safely clean yourself, what you should not DIY, and what to do if you are already feeling unwell.

TL;DR (read this first)

• Look for moisture first. Leaks, condensation, humidity, poor ventilation.

• Musty smell counts, even if you cannot see mould.

• Small areas on hard surfaces can often be cleaned safely with good ventilation and protective gear.

• Avoid dry brushing or vacuuming mould dry. It can spread spores. 

• Porous items that stayed wet for more than about 48 hours often need drying fast or disposal if mouldy. 

• If you are very sensitive, have asthma, or are immunocompromised, do not do the cleanup yourself. 

A quick safety note before you start

Cleaning mould can irritate eyes, skin, and lungs. Some people should not be involved in cleanup, especially people with asthma or chronic lung disease, immune suppression, or significant mould allergy. 

If you are in that category, get someone else to handle cleanup, or use a qualified professional.

Step 1: Find the moisture source (this is the real “treatment”)

Mould needs moisture. So your first job is to work out why an area is staying damp.

Common sources:

• Roof leaks, plumbing leaks, dripping air conditioners

• Bathroom steam with poor ventilation

• Condensation on windows and cold walls

• Rising damp or subfloor moisture

• Flooding, storms, wet carpets, wet insulation

If you only wipe the mould but the dampness continues, it usually returns.

Step 2: Know the common mould hiding spots

Mould is often not in the middle of the wall. It tends to be in corners and quiet zones where air does not move.

Check:

• Window frames, sills, and curtains

• Bathrooms, ceilings, grout, behind toilets

• Under sinks and behind dishwashers

• Behind wardrobes, especially on external walls

• Bedrooms with closed windows and lots of soft furnishings

• Laundries and around washing machines

• Under rugs, behind couches, inside cars that have moisture issues

If it smells musty, treat that as a clue even if you cannot see anything.

Step 3: Decide if this is a DIY job or a professional job

A simple rule is: small and on hard surfaces is more DIY-friendly. Bigger, hidden, or structural is not.

DIY is more reasonable when:

• The patch is small and on a hard surface (tiles, glass, sealed surfaces)

• You can ventilate well

• You can protect yourself with proper gear

• There is no ongoing leak

Consider professional help when:

• The affected area is large or keeps returning

• Mould is in roof cavities, under floors, inside walls, or in insulation

• There has been flooding or significant water damage

• You have major health sensitivity and cannot tolerate exposure

• You need to remove building materials like plasterboard

Step 4: What to wear (yes, it matters)

Protect yourself and keep spores from spreading.

At minimum for cleaning:

• Gloves (nitrile or rubber)

• Eye protection

• A P2 mask (Australia) or N95 equivalent

• Clothing that covers skin, then wash after

This aligns with Australian health guidance and occupational safety advice. 

Step 5: Do not dry brush mould

Avoid dry brushing or wiping mould dry. It can release spores into the air and spread the problem. 

Use a damp method and dispose of cloths appropriately.

Step 6: How to clean small areas safely (hard surfaces)

For routine cleanup, NSW Health suggests mild detergent or a vinegar-and-water solution, and only using bleach in specific situations when items cannot be discarded and mould is not readily removed. 

Vinegar solution (for routine cleaning)

NSW Health lists a diluted vinegar approach as an option for routine clean-up of mouldy surfaces. 

Step 7: Porous materials (soft items) are a different game

Carpet, plasterboard, insulation, mattresses, soft furniture, and some timbers can be hard to clean properly once mouldy.

WorkSafe Queensland notes that if porous materials have been wet for less than about 48 hours, you may be able to dry them quickly, but if wet longer and mould develops they can be difficult to clean properly. 

CDC guidance also emphasises that cleanup depends on the extent of water damage and can involve removing and replacing materials in bigger jobs. 

If in doubt, especially after flooding, seek professional advice.

Step 8: Drying and prevention (how to stop it coming back)

Cleaning removes what you can see. Prevention is what keeps you from doing this again next month.

Practical prevention:

• Keep indoor humidity lower (dehumidifier can help)

• Use exhaust fans in bathrooms and kitchens

• Increase airflow in wardrobes and bedrooms

• Fix leaks properly, not “later”

• Dry wet areas fast after storms or spills

• Avoid drying clothes indoors without ventilation

NSW Government tenant guidance also emphasises early cleaning and drying thoroughly, since mould is much harder to remove once it takes hold. 

If you are feeling unwell, do this next

If mould is part of your health picture, the best health plan starts with the same principle.

Stop the leak before you mop the floor.

That means reducing exposure as best you can, then stabilising foundations like sleep, digestion, stress response, and steady routines. If you are sensitive, avoid doing ten new supplements at once. Go one step at a time.

Mould Exposure: Why You Feel Worse and What to Do First

Mould Exposure Symptoms

Book an appointment

If you want a guided plan using acupuncture and Chinese herbal medicine, you can book an appointment here.

Book an appointment

FAQ

How do I know if mould is “bad enough” to worry about?

If it keeps returning, smells musty, is widespread, or you suspect it is hidden inside walls or ceilings, it is worth getting professional assessment. If you are very sensitive or have asthma, do not DIY cleanup. 

Is vinegar better than bleach?

NSW Health lists vinegar diluted in water as an option for routine cleanup, and bleach as an option in specific situations. Bleach has important safety considerations and may not be effective on porous surfaces. 

Should I vacuum mould?

Avoid dry methods like dry brushing, and be cautious with vacuuming mould because it can spread spores if not handled correctly. Damp cleanup methods are generally recommended in public health guidance. 

What if my landlord will not fix the leak?

Document the issue (photos, dates, communications). The underlying moisture issue needs proper repair or mould often returns. NSW Government housing guidance emphasises reporting damp and addressing maintenance issues. 

by Eric Higashino

Mould Exposure Symptoms: Common Patterns

If you are trying to figure out whether mould could be part of your health picture, symptoms can feel confusing. That is because mould related issues are rarely one neat symptom. It is usually a pattern.

This page will walk you through the most common symptom patterns people report, what makes mould more likely, and what to do next without going down a rabbit hole.

Important note: This is educational and not a diagnosis. Many symptoms below can have other causes. If you are worried, book an appointment.

TL;DR (read this first)

• Mould related symptoms are often multi-system, not just one issue.

• The most common pattern is fatigue plus brain fog, often with sinus, skin, or gut symptoms.

• A key clue is symptoms that improve away from a building and flare when you return.

• The best first step is not a hardcore detox. It is reducing exposure where possible and stabilising sleep, digestion, and stress response.

• If you want a structured plan, you can book an appointment or start with the free mould starter guide.

Why symptom “patterns” matter more than one symptom

If you only look for one signature symptom, you will miss the bigger picture. Most people I see are dealing with a mix of issues that seem unrelated. They might have fatigue, brain fog, sinus congestion, and gut flares, plus random skin reactions.

When multiple body systems are involved at the same time, it is worth stepping back and asking a better question: what is keeping the body in defence mode?

Mould can be one of those factors for some people, especially if there is ongoing exposure.

The five most common symptom patterns

1) Fatigue that does not recover with rest

This is not just “tired.” People often describe a heavy, flat fatigue, or a wired but tired feeling where they cannot switch off. They may sleep but wake unrefreshed. Some feel like their battery never charges past 30 percent.

Fatigue can come from many causes, so it is not proof of mould. What makes it more suspicious is fatigue that comes with brain fog or reactivity, or fatigue that clearly changes depending on environment.

2) Brain fog, poor focus, headaches

Brain fog is one of the most common reasons people start searching for answers. The usual description is slower thinking, word-finding issues, poor concentration, and a sense of being mentally “offline.”

Headaches can also be part of the picture, including pressure headaches, tension patterns, or headaches that flare in certain buildings. Again, this is not specific to mould. But when it clusters with sinus, fatigue, and reactivity, it becomes part of a recognisable pattern.

3) Sinus congestion, post-nasal drip, throat irritation, cough

This is the most straightforward category because it overlaps with allergies and irritant exposure. People often report:

• persistent blocked nose or runny nose

• post-nasal drip

• sore throat or frequent throat clearing

• cough or chest irritation

Sometimes the symptoms are subtle but constant. Sometimes they flare sharply when humidity rises, after rain, or when spending time in a specific room.

If you have wheezing, shortness of breath, or asthma symptoms, please speak with your GP.

4) Skin flare-ups and itching

Skin is one of the body’s loudest alarm systems. People may notice:

• itching that is hard to explain

• eczema flare-ups

• hives or rashes

• redness and sensitivity that comes and goes

Skin symptoms can be driven by many things, including food triggers, stress, and histamine-type reactivity. If mould is part of your picture, skin can be one of the places it shows up.

5) Gut symptoms (bloating, reflux, diarrhoea, constipation)

Gut symptoms are common in chronic illness generally, and mould is not the only possible driver. That said, many people with suspected mould exposure notice gut instability such as:

• bloating and pressure

• reflux

• looser stools or alternating patterns

• nausea or reduced appetite

One reason the gut matters is that when digestion is unstable, the whole system can become more reactive. Stabilising meals, timing, and tolerance is often a smarter first move than trying to “cleanse” aggressively.

Other common symptoms people report

Not everyone gets these, but they show up often enough to mention:

• sleep disruption, vivid dreams, trouble staying asleep

• anxiety, irritability, feeling on edge

• dizziness or lightheadedness

• sensitivity to smells, chemicals, smoke, or perfumes

• muscle aches, joint pain, or increased inflammation feeling

• new or worsening food reactions

The bigger the spread of symptoms across different systems, the more important it is to take a calm, structured approach.

Clues that make mould more likely (not proof, just clues)

Here are common clues that raise suspicion:

• Symptoms are clearly worse in one building and better away from it

• Musty smell, visible water damage, recurring leaks, or condensation problems

• Symptoms worsen after rain, humidity, or being in poorly ventilated rooms

• You feel worse after time in wardrobes, bathrooms, bedrooms, or cars with moisture issues

• Multiple people in the same environment feel unwell, even if symptoms differ

None of these confirm anything on their own. They are just signals worth taking seriously.

What to do first (simple and practical)

If you are a beginner, the fastest way to waste time is doing too much, too soon. Try this sequence instead.

Step 1: Reduce exposure where you can

You do not need to panic, but you do need to be honest. If there is ongoing dampness or water damage, no protocol will fully “out-supplement” that. Start with the basics: ventilation, humidity control, and getting leaks assessed.

Related: What To Do If You Suspect Mould in Your Home (First Steps That Matter) (internal link)

Step 2: Stabilise foundations

This is where many people turn a corner:

• consistent sleep timing

• regular meals your gut tolerates

• hydration

• gentle movement

• downshifting stress response

Step 3: Add support gradually

If you are sensitive, treat your body like it is already overloaded. Introduce one change at a time, start low, and track your response. If you try ten things at once, you will not know what helped or what hurt.

How Chinese medicine looks at these patterns

Chinese medicine often describes these presentations in terms of patterns such as dampness, phlegm, heat, and constraint. You can think of these as functional maps, not labels.

In practice, I focus on the basics first: digestion, sleep, stress regulation, and reducing reactivity. When the system is steadier, targeted treatment tends to land better and you get less of the “everything makes me worse” experience.

Book an appointment

If you want a guided plan using acupuncture and Chinese herbal medicine, you can book an appointment here.

Book Appointment

FAQ

Can mould cause brain fog and fatigue?

Some people report fatigue and brain fog that seems linked to certain environments. These symptoms also have many other possible causes. The practical approach is to look for patterns, reduce exposure where possible, and stabilise foundations while you get appropriate medical guidance.

Are sinus symptoms always mould?

No. Sinus symptoms are common with allergy, infections, irritants, and structural issues. Mould is one possible factor, especially with damp buildings or water damage.

What if my symptoms are mostly gut related?

Gut symptoms can be part of the picture, but they are not specific to mould. Focus first on stabilising meals, tolerance, sleep, and stress response. If exposure is ongoing, address that too.

Should I start detox supplements if I suspect mould?

If you are still exposed or very reactive, strong protocols can backfire. Many beginners do better with a staged plan and one change at a time.

What is the biggest clue that mould is involved?

A consistent pattern where symptoms improve away from a building and flare on return is a strong clue. It still is not a diagnosis, but it is worth taking seriously.

Can acupuncture help with reactivity?

It can help support regulation, sleep, pain patterns, digestion, and recovery capacity for some people. Pacing matters, especially if you are highly sensitive.

by Eric Higashino