How to check for mold in your home — signs and symptoms of hidden mold exposure

How to Check for Mold in Your Home & Why It May Be Behind Your Mystery Symptoms | Ashley Drummonds

March 25, 2026

How to Check for Mold in Your Home — And Why It Might Be Behind Your Mystery Symptoms

By Ashley Drummonds, Integrative Health Specialist

If you've been dealing with unexplained fatigue, anxiety, brain fog, sleep problems, or symptoms that just don't seem to fit neatly into any diagnosis — I want you to consider something that most doctors never bring up: mold in your home.

I've worked with clients who spent years bouncing between specialists, collecting diagnoses like panic disorder, chronic fatigue syndrome, and POTS — only to discover that a hidden mold problem in their living environment was quietly driving everything. Once we addressed the mold exposure alongside the internal healing protocol, everything started to shift.

But here's the thing — mold is sneaky. It hides. It grows in places you'd never think to look. And most people have no idea it's even there until the damage to their health is already significant.

So today, I'm breaking down exactly how to check for mold in your home, what warning signs to look for, and why this matters so deeply for your health — especially if you're on a healing journey right now.

Why Mold Is More Dangerous Than Most People Realize

Here's something that puts it into perspective: according to the EPA, the average American spends about 90% of their time indoors. That means if your home or workspace has a mold problem, you are being exposed to it nearly around the clock — breathing in mold spores and mycotoxins day after day without even knowing it.

Mold isn't always something you can see. It grows hidden behind walls, under floors, in attics, in crawl spaces, and inside HVAC systems. And while it's growing silently, it can be quietly wrecking your health.

What Mold Toxicity Does to Your Body

When mold releases spores into the air, you breathe them in — and your immune system recognizes them as a threat. This triggers chronic inflammation that, over time, can affect virtually every system in your body, but especially the nervous system.

Mold produces toxic compounds called mycotoxins. These mycotoxins can cross into the bloodstream and reach the brain, where they interfere with normal neurological function. This is why mold toxicity can look so much like mental health and neurological conditions — because it is literally affecting your brain and nervous system.

Common symptoms of mold toxicity include:

Chronic fatigue and low energy that doesn't improve with rest
Anxiety, panic attacks, and nervous system dysregulation
Brain fog, memory problems, and difficulty concentrating
Headaches and dizziness
Sleep disturbances
POTS-like symptoms — blood pressure instability, fainting spells
Numbness or tingling in the body
Hormonal disruption and adrenal burnout
Gut issues, food sensitivities, and immune dysregulation

Sound familiar? These are also some of the most commonly misdiagnosed symptoms I see in my practice. If any of these resonate with you, checking your home environment for mold is a critical piece of the puzzle.

"Mold toxicity can look like anxiety, panic disorder, or chronic fatigue — because it is literally affecting your nervous system. It gets missed because nobody thinks to look at the home environment."

Where to Check for Mold in Your Home

Mold needs three things to grow: moisture, warmth, and something to feed on. That means any area of your home that has had water exposure — even once, even years ago — is a potential mold zone. Here are the most important places to start your inspection.

1. Bathrooms and Kitchens

These are the most obvious hot spots and the first places I tell clients to look. The steam from showers, the humidity from cooking, and the constant presence of water make bathrooms and kitchens prime environments for mold growth.

In the bathroom, check:

Around the base of the toilet
Under and around the sink
The grout lines between tiles in the shower and tub
The caulking around the tub and shower — black or gray discoloration is a red flag
Inside the exhaust fan (a common hiding spot)
Under bath mats that sit on damp floors

In the kitchen, check:

Under the sink — especially if there has ever been a slow leak
Behind and under the refrigerator
Around the dishwasher seal and underneath it
The rubber gaskets on the refrigerator door
Around window sills where condensation collects

2. Attics, Basements, and Crawl Spaces

These are the areas most people never check — which is exactly why mold can grow completely unchecked in them for years. Poor ventilation, humidity, and proximity to the outdoor environment make these spaces extremely high risk.

In the attic, look for dark staining on the wood, visible fuzzy growth, or a strong musty odor. Attic mold is especially concerning because your HVAC system may be pulling air through that space and circulating mold spores throughout your entire home.

In the basement and crawl space, check the walls, floors, exposed wood beams, and any insulation. If the space smells musty — even faintly — take it seriously. A musty smell is mold's calling card.

3. Areas Around Windows and Doors

Condensation on windows during temperature changes creates consistent moisture — and mold loves consistent moisture. Check the window sills, the tracks, and the surrounding drywall for any discoloration, staining, or peeling paint.

4. HVAC Systems and Air Ducts

This one is huge and almost always overlooked. If mold gets into your HVAC system, it gets distributed through every single room in your home every time the heat or air conditioning runs. Check the area around vents for dark dusty buildup, and have your ducts professionally inspected if you suspect a problem.

5. Laundry Rooms and Poorly Ventilated Closets

Any enclosed space with limited airflow can trap humidity and become a breeding ground for mold. Laundry rooms are especially susceptible — check behind the washing machine, around the dryer vent, and along the baseboards.

5 Hidden Signs of Mold You Might Be Missing

Sometimes mold isn't visible at all — but your home will give you clues if you know what to look for. These are the warning signs I always tell clients to watch for:

1. Bubbling Walls or Ceilings

Bubbling or blistering on walls, ceilings, or floors means moisture has gotten trapped beneath the surface. This is often one of the earliest signs of hidden mold growth — the trapped moisture is creating the perfect environment for mold to thrive right underneath what you can see.

2. Buckling or Separating Floors and Walls

If your floors are starting to warp, or you notice walls separating from baseboards or ceilings, moisture has likely seeped into the building materials. Pay close attention near windows, doors, and anywhere close to water sources like sinks and bathtubs.

3. Cracking or Peeling Paint and Wallpaper

When surfaces get too wet, they lose their adhesion and begin to crack and peel. Behind that damaged surface, mold may already be growing — feeding on the dampness trapped underneath. Don't dismiss peeling paint as just a cosmetic issue.

4. Rust and Efflorescence

Rust on metal pipes or appliances signals high humidity or a slow leak nearby — both ideal conditions for mold. Efflorescence (a white, chalky, powdery residue on walls or foundations) indicates excess moisture migrating through concrete or masonry. Where there is consistent moisture, mold is rarely far behind.

5. Water Stains and Discoloration

Yellow, brown, or dark stains on ceilings, walls, or floors are a clear sign that water has been sitting somewhere it shouldn't be. The older and darker the stain, the longer the moisture has been present — and the higher the likelihood that mold has already established itself in that area.

The Role of Dust in Mold Exposure (This Surprises Most People)

Most people don't realize that household dust plays a direct role in mold exposure. Dust acts as a net — it collects and holds mold spores, mycotoxins, and other airborne particles that settle out of the air over time. And because dust also absorbs and retains moisture from the air, it can actually create small environments within your home where mold spores can survive and thrive.

This is one of the reasons I always talk with clients about keeping their homes as dust-free as possible, especially when they are in an active healing phase from mold toxicity. Regular dusting, vacuuming with a HEPA filter, and changing air filters frequently all make a meaningful difference in reducing your overall mold and mycotoxin burden.

Practical Tips to Prevent Mold Growth in Your Home

Once you've checked for existing mold, the next step is making your home less hospitable to future growth. Here's what I recommend:

Control humidity levels. Mold thrives when indoor humidity is above 50%. Aim to keep your home between 30–50% humidity. A simple hygrometer (humidity monitor) from any hardware store can help you track this, and a dehumidifier can make a significant difference in damp areas.
Address moisture immediately. Mold can begin growing on wet surfaces like drywall and carpet within 24 to 48 hours. If you have a spill, a leak, or any flooding — even minor — dry it out completely and quickly.
Improve ventilation. Make sure bathrooms and kitchens have working exhaust fans and use them consistently. Open windows when weather permits to improve airflow throughout your home.
Clean your gutters regularly. Clogged gutters cause water to back up and seep into your home's foundation and walls — a leading cause of basement and crawl space mold.
Use a medical-grade air purifier. A high-quality air purifier with a HEPA filter can significantly reduce airborne mold spores and mycotoxins circulating in your home. This is especially important if you are actively healing from mold toxicity.
Keep your home dust-free. As I mentioned above, dust collects and harbors mold spores. Regular cleaning with a HEPA vacuum is one of the simplest things you can do to reduce your exposure.
Seal windows properly. Check that windows are sealed tightly and clean the sills and tracks regularly to prevent moisture buildup and mold growth around the frames.

When to Call a Professional Mold Inspector

There are situations where DIY checking is simply not enough — and trying to handle it yourself can actually make things worse by disturbing mold colonies and spreading spores further through your home. I recommend getting a professional inspection if:

You have visible mold covering more than a small surface area
You have a persistent musty smell but cannot locate the source
You or someone in your household has unexplained chronic health symptoms (especially the ones listed earlier in this post)
Your home has had any history of flooding, water damage, or roof leaks
You are in the process of healing from mold toxicity and need to verify your environment is safe

A professional inspector can use tools like moisture meters, thermal imaging cameras, and air sampling to find mold that is completely invisible to the naked eye. For anyone who is mold-sensitive or immunocompromised, a thorough professional inspection is not optional — it's essential.

I personally refer clients to professional mold inspection services as part of their healing protocol, because you cannot fully heal from mold toxicity if you are still being exposed to it daily in your own home.

Mold Toxicity and Your Healing Journey: The Connection You Need to Understand

I've shared before in my case study on panic attacks, chronic fatigue, and POTS symptoms that mold toxicity was a significant piece of one of my client's healing puzzles. She had been misdiagnosed with panic disorder, was struggling with severe fatigue, and had POTS-like symptoms that nobody could explain — and one of the major underlying drivers was chronic mold exposure.

When we added a personalized mold healing protocol to her program — addressing both the external environment and supporting her body's ability to detox mycotoxins — everything accelerated. The nervous system began to regulate. The adrenals started recovering. The anxiety lessened. Sleep improved.

You cannot out-supplement a moldy environment. Both pieces have to be addressed together: removing the source of exposure and healing the body from the inside out.

If you suspect mold may be a factor in your health struggles, please don't dismiss it. Get your home checked, work with a practitioner who understands mold toxicity, and know that healing is absolutely possible.

Ready to Get to the Root Cause of Your Symptoms?

If you're resonating with what you've read here — if you've been dealing with chronic mystery symptoms and you have a gut feeling that something in your environment might be contributing — I would be honored to support you.

As an Integrative Health Specialist, I work with clients one-on-one to investigate every layer of what might be driving their symptoms — including mold toxicity — and build a personalized protocol to address it from the root.

👉 Book a One-on-One Root Cause Strategy Call with Ashley

👉 Read the Full Case Study: How One Client Healed Panic Attacks, Chronic Fatigue & POTS Symptoms

Here's to truly healing,

Ashley Drummonds

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