What to do if you smell mold but don't see it?

Author: Mr. Ransom Adams  |  Last update: Tuesday, July 8, 2025

When a homeowner smells mold but visual clues are invisible to the naked eye, then mold testing can be performed by a professional to locate the colonies. A mold testing kit can also be inexpensively purchased from the local hardware store and utilized by the homeowner.

What if I can smell mold but can't find it?

If you weren't able to identify where the moldy smell is coming from, the mold might be growing in hidden areas like ducts, air vents, HVAC, attics, or walls. Check humid and damp areas in your home where mold might be hiding. If these methods fail, consult a professional to inspect your home for mold contamination.

Can you detect mold without seeing it?

If you don't see signs of mold, but you can smell it, it may be hidden in your walls. A musty smell indicates that mold is growing in your home. The smell of mold feels earthy, like rotting leaves or decaying wood in a dense, damp forest.

How do you get rid of mold if you can't see it?

Bleach solutions can work on nonporous surfaces, but most materials in your house are porous. As such, a vinegar solution is a better option, or you can contact a remediation company to demolish and replace the affected areas. The EPA agrees that bleach should not be used as a routine practice during mold cleanup.

Why am I randomly smelling mold?

Phantosmia may be caused by a head injury or upper respiratory infection. It also can be caused by aging, trauma, temporal lobe seizures, inflamed sinuses, brain tumors, certain medicines and Parkinson's disease. Phantosmia also can result from a COVID-19 infection.

9 Signs You Have Toxic Mold In Your Home

What smells like mold but isn't?

Musty odors can be caused by hidden sources of moisture such as leaking pipes, condensation or poorly ventilated areas.

Why do I keep smelling mold in my nose?

Phantosmia is a condition that causes you to detect smells that aren't actually in your environment. It can happen in one nostril or both — and the odors may be foul or pleasant. Common causes include colds, allergies, nasal polyps and dental issues. Treatment depends on the underlying cause.

What are signs of mold sickness?

Although symptoms can vary, the most common symptoms seen in people exposed to mold indoors include:
  • Nasal and sinus congestion.
  • Eye irritation, such as itchy, red, watery eyes.
  • Wheezing and difficulty breathing.
  • Cough.
  • Throat irritation.
  • Skin irritation, such as a rash.
  • Headache.

What kills 100% of mold?

Hydrogen peroxide, commonly used to disinfect wounds, is active against a wide variety of micro-organisms including mold. It acts by releasing oxygen at a rapid rate, which kills mold by oxidizing the surface and breaking down proteins and DNA.

Can mold be present if you don't see it?

Outdoors, molds play a part in nature by breaking down dead organic matter such as fallen leaves and dead trees, but indoors, mold growth should be avoided. Molds reproduce by means of tiny spores; the spores are invisible to the naked eye and float through outdoor and indoor air.

How to tell if mold is behind walls?

How Do I Detect Mold Inside My Walls and Drywall? Peeling wallpaper can also be a symptom of mold. While some scruffiness and discoloration tend to eventually strike your wallpaper, unusual surface or peeling abnormalities such as crackling or bubbling can be a sign of wall moisture.

What does black mold smell like?

Black mold has a distinct smell. It's often described as musty and earthy and may even smell like rotting vegetables, plants, or paper. Some think it smells like cedar.

How to detect invisible mold?

Here are 11 signs that may indicate the growth of hidden mold inside your home:
  1. Visible Mold Spores. ...
  2. Dark Spots on Surfaces. ...
  3. Musty, Damp, or Earthy Smell. ...
  4. Allergic Reactions. ...
  5. Struggle With Respiratory Issues. ...
  6. Your HVAC System Smells Weird. ...
  7. Warped Walls. ...
  8. Dark Tile Grout.

Is it safe to sleep in a room that smells like mildew?

A: It's not advisable to sleep in a mouldy room. Mould spores can affect your respiratory system, allergies and sleep quality.

How to track down mold smell?

To check your bedrooms for mould, look for visible signs on the walls, in corners, and behind furniture. Also try checking your dirty laundry, looking for leaks around the ceiling, pipes, and radiators, and for damp patches on your soft furnishings.

Can mold behind drywall affect you?

Mold behind drywall can be very harmful to our health. Black mold is especially dangerous because of its severe effects. It can cause serious respiratory problems. People who breathe in mold spores often get respiratory infections.

What draws out mold?

Mix a solution that's equal parts white vinegar and cold water in a spray bottle. Spray or apply the vinegar and water mixture directly to the moldy areas. Using a scrub brush with a long handle, scrub the moldy areas vigorously in a circular motion. Continue scrubbing until you remove the mold stains.

What degrees kills mold?

Most yeasts and molds are heat-sensitive and destroyed by heat treatments at temperatures of 140-160°F (60-71°C). Some molds make heat-resistant spores, however, and can survive heat treatments in pickled vegetable products. These molds, however, require oxygen to grow.

How to clean mold from air?

To get rid of mold spores, we recommend using air purifiers with:
  1. Mechanical Air Filters.
  2. Electronic Air Filters.
  3. UVGI Cleaners.
  4. Ozone Generators.

What happens if you breathe in mold for a long time?

Chronic Fatigue: Mold forces your body to work harder, leading to persistent fatigue, especially in those with pre-existing conditions. Lung Issues: Prolonged exposure can cause lasting damage to lung function.

Can you clean up mold yourself?

Scrub mold off hard surfaces with detergent and water, and dry completely. Fix plumbing leaks and other water problems as soon as possible. Dry all items completely. Absorbent or porous materials, such as ceiling tiles and carpet, may have to be thrown away if they become moldy.

What happens if you live in a house with mold?

Adults who live in moldy homes are up to 50 percent more likely to develop asthma. Children are even more likely to develop health issues like asthma and rhinitis. Mold exposure has also been associated with other upper respiratory infections, with symptoms that can range from sinus infections to sore throats.

Is it bad to inhale the smell of mold?

Exposure to a large number of mold spores may cause allergic symptoms such as watery eyes, runny nose, sneezing, itching, coughing, wheezing, difficulty breathing, headache, and fatigue. Repeated exposure to mold can increase a person's sensitivity, causing more severe allergic reactions.

How to get rid of mold in your sinuses?

Management and Treatment
  1. Antifungals: Some types of infection require medications to kill the fungus. ...
  2. Corticosteroids: Your provider may prescribe steroids to reduce inflammation and relieve sinus pressure.
  3. Nasal wash: To treat saprophytic fungal sinusitis, providers remove crusts of mucus and wash out your sinuses.

How do you know if you have a parasite in your nose?

Diagnosis of nasal myiasis is based on history taking and physical examination. Patients with nasal myiasis usually present with epistaxis, thick mucus nasal discharge, nasal obstruction and malodorous, facial pain, headache, and a sensation of a foreign body moving within the nose [7].

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