Can mold inside walls make you sick?

Author: Craig Cummings  |  Last update: Friday, January 30, 2026

Can Mold Inside Walls Make You Sick or Does It Need to Be Exposed? Yes. Even if you can't see it, mold can make you sick. Spores can spread throughout your home, even from relatively contained areas like inside the wall.

How do you tell if mold is making you sick?

Signs and symptoms of allergic rhinitis caused by a mold allergy can include:
  • Sneezing.
  • Runny or stuffy nose.
  • Cough and postnasal drip.
  • Itchy eyes, nose and throat.
  • Watery eyes.
  • Dry, scaly skin.

Is it safe to live in a house with mold in the walls?

Mold growing in your home can be a health hazard, especially if you have asthma, allergies, or a weak immune system. If you have a mold problem, it's usually more important to clean it up and prevent new mold from growing than to figure out what kind of mold you have.

What are the symptoms of mold in the walls?

You can usually see or smell a mold problem. Mold can appear as slightly fuzzy, discolored, or slimy patches that increase in size as they grow. Most molds produce musty odors that are the first indication of a problem. Mold can grow anywhere there is adequate moisture or a water problem.

Is it safe to sleep in a room with mold on the wall?

A: Sleeping in a mouldy room is not advisable. Mould can release spores that, when inhaled during sleep, may lead to respiratory issues and allergies. These can disrupt your sleep and harm your overall health.

What are the symptoms of a mold allergy or reaction to exposure?

How long can you stay in a house with mold?

Generally, a person can stay in a moldy home for years, though some people could feel extremely uncomfortable.

Does opening windows help with mold?

Mould thrives in damp areas such as windows, where there is dust, dirt or organic material, that's why the number one way to reduce mould is to open your windows regularly. By opening the windows at least once a day, this allows the mould spores to escape and lets patches of moisture dry out.

How to tell if mold is behind drywall?

Musty Smell

If you think there's mold in your walls, get on your hands and knees and smell the electrical outlets. This might sound silly, but it may help you sense mold if it's growing within walls. Outlets have better access to the area behind the walls. Thus, smelling them can help identify the mold problem.

Can you get ill from mold on walls?

Respiratory effects

Damp and mould predominantly affect the airways and lungs. The respiratory effects of damp and mould can cause serious illness and, in the most severe cases, death. The respiratory effects include: general symptoms such as cough, wheeze and shortness of breath.

How do you check yourself for mold poisoning?

Urine mycotoxin tests are ideal for testing yourself (and your family members) for mycotoxin exposure. They're absolutely painless, totally non-invasive, and incredibly easy to use.

How to tell if your house is toxic?

If you suspect your asthma worsens or is more severe than usual, contact your doctor or medical professional.
  1. Bad Smells In The Home. When there's a bad smell in the home, you can tell. ...
  2. Peeling Wallpaper. ...
  3. Spots On The Wall. ...
  4. Bad Allergies Won't Go Away. ...
  5. Visible Mold Growth. ...
  6. Past Water Damage.

What are the neurological symptoms of mold exposure?

Mold exposure can cause a variety of neurological effects, including headaches and migraines, cognitive impairments, memory loss, confusion, impaired motor skills, depression, and other behavioral changes. Due to mold exposure, people with weakened immune systems may be more susceptible to neurological symptoms.

Who pays for mold remediation?

If there is a covered condition that the homeowner's insurance policy covers that causes mold, then the insurance company will cover mold remediation. Excess water from a natural cause like a roof leaking after a rain storm is usually covered by a homeowners insurance policy.

What is the first symptom of mold exposure?

Common symptoms include sneezing, coughing, congestion and eye irritation. It rarely causes serious illness or death but may worsen asthma symptoms.

How to test if your house is making you sick?

If you want to monitor your indoor air quality proactively, you can invest in an air quality monitor. This will help you test if your house is making you sick. These devices constantly check the indoor air quality and provide feedback about the levels of different pollutants.

What kills mold in the body?

Activated Charcoal: Absorbs toxins, potentially helping to clear mold spores from your system. Take it in capsule form to absorb toxins. It's best used under medical supervision, especially after known mold exposure.

Can black mold behind walls harm you?

For most people, being exposed to black mold may only cause mild respiratory systems, such as a runny nose. Experts don't agree on whether it can lead to more serious issues, such as pulmonary hemorrhage (bleeding in the lungs), which can be fatal. More studies need to be done.

How long does mold sickness last?

For most people symptoms will go away in 1 to 3 days, assuming their exposure is limited and the mold is cleaned up/avoided. If your symptoms persist or worsen, it would be a good idea to visit your doctor. They can prescribe an allergy medication or provide other treatment ideas to make sure you are feeling better.

Can you get sick from sleeping in a house with mold?

More severe symptoms such as fever, shortness of breath, and lung infection may occur from mold exposure in people with underlying health conditions or a weakened immune system. Children exposed to mold in the first year of life may have an increased risk. View Source of developing asthma.

How to get rid of mold inside walls?

How to Remove Mold from Inside Walls
  1. Contain Your Work Area. Before you start work, protect the other areas of your home. ...
  2. Remove the Affected Drywall. ...
  3. Remove the Insulation. ...
  4. Dry Out the Area. ...
  5. Vacuum the Space. ...
  6. Kill the Mold. ...
  7. Contain and Encapsulate the Mold. ...
  8. Close and Rebuild the Wall.

Does homeowners insurance cover mold?

Homeowners insurance doesn't usually cover mold damage or removal unless it's the result of a covered peril. If the mold in your residence was caused by something sudden or accidental, such as a bursting pipe or some other covered incident on your policy, you may be protected.

Can mold grow behind shower walls?

Mold issues in the shower surround can be broken into two broad categories – surface mold growth and mold behind the surround. Surface mold growth is unsightly and can be difficult to remove. However, it's the moisture hidden in the framing behind the shower that can lead to structural damage and expensive repairs.

Do fans help with mold?

Ventilation fans are the best way to prevent mold build up inside a home. Think about it: what happens when a home has a flood? Typically, a water damage expert will be called in and the first thing they do is bring in ventilation fans to dry out the moisture and wetness inside the home.

How long should you keep windows open to air out of a house?

15 minutes is enough to air the house properly

A window open for 15 minutes is enough! That's it. With this method, only the indoor air will be cooled. It will take just a few minutes to heat the room again.

How to avoid mold in bedroom?

To prevent mould from returning, you'll need to reduce humidity and improve ventilation in the room. Use dehumidifiers, fans, or air conditioners, and make sure your home has adequate insulation. Regularly check for leaks in your home's plumbing and roof, as excess water can lead to mould growth.

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