Why am I randomly smelling mold?

Author: Dr. Billy Hickle IV  |  Last update: Monday, June 22, 2026

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.

Why do I smell mold when there is none?

Phantosmia refers to detecting smells that aren't really there. It's a symptom of many common conditions, including allergies, colds and upper respiratory infections. It could also indicate a brain-related condition, including epilepsy, stroke or Alzheimer's disease.

Why do I keep smelling mold in my nose?

Possible causes range from nasal polyps to a stroke. Phantosmia is also called a phantom smell or an olfactory hallucination. Causes include problems with the nose, such as sinusitis, or conditions of the nervous system or brain, including migraine, stroke, or schizophrenia.

What happens if you keep smelling mold?

Yes, smelling mold can potentially make you sick, especially if you are sensitive or allergic to mold. While simply smelling mold may not cause illness in everyone, exposure to mold spores can lead to various health issues, particularly for individuals with respiratory conditions, allergies, or weakened immune systems.

Why does my house randomly smell like mold?

If you smell mold but can't see it, it could be growing behind drywall or wallpaper, under wood paneling, or in walls near pipes. It also could be under carpeting or ceiling tiles, or inside air ducts. Mold grows where there's lots of moisture, like under a sink with a leaky pipe or in a poorly ventilated bathroom.

9 Signs You Have Toxic Mold In Your Home

Why do I keep randomly smelling mold?

An olfactory hallucination, known as phantosmia, makes you detect smells that aren't in your environment. The odors you notice in phantosmia are different from person to person and may be foul or pleasant. You may notice the smells in one or both nostrils.

What to do if you smell mold but can't find it?

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 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 does toxic black mold smell like?

Toxic black mold tends to form in consistently humid environments, like attics, or in areas that were subject to prolonged flooding issues, like basements, crawlspaces, and around foundations. Toxic black mold growth has a more potent and identifiable smell, like the smell of decay, wet soil, or rot.

Can you smell mold behind walls?

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.

Why do I smell mold in the air?

Moisture Buildup

Excess moisture can create a breeding ground for mold and mildew, leading to musty smells. This can occur when the air conditioner's condensate drain line becomes clogged, or there is improper insulation around the unit.

What kills fungus in the sinuses?

Antifungal medications can be used as well, but usually not without a surgery. There have been some studies that indicate that antifungal medications called “azoles,” such as itraconazole, can be useful in treating allergic fungal sinusitis. With invasive fungal sinusitis, use of antifungal medications is required.

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].

What smells like mold but isn't?

Excess Humidity

Humidity in the air is often the cause of mold, but it can also cause a strong smell even if no mold has formed.

Why do I smell mold in my nose?

Acute or Chronic Sinusitis

These symptoms collectively can cause a foul smell in the nose. Sinusitis can be acute (short term, lasting 3-8 weeks) or chronic (long term.) It is typically caused by a strain of bacteria but can also be caused by a virus or fungus.

Why do I smell like mold down there?

Bacterial vaginosis is an overgrowth of bacteria typically present in the vagina. It's a common vaginal condition that can cause vaginal odor. Trichomoniasis, a sexually transmitted infection, also can lead to vaginal odor.

What happens if you smell mold directly?

A moldy odor suggests that mold is growing in the building and should be investigated. The health effects of inhaling mVOCs are largely unknown, although exposure to mVOCs has been linked to symptoms such as headaches, nasal irritation, dizziness, fatigue, and nausea.

What can be mistaken for black mold?

Aureobasidium

This yeast-type fungus can be mistaken for another more sinister and dangerous mold but is far less likely to make you sick. Aureobasidium can start as a slimy pink color, but it will turn brown or black and can look like black mold.

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.

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.

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.

How to detox from mold?

To remove mold from your system, focus on strengthening your detox pathways. This includes taking supplements like glutathione, consuming antioxidant-rich foods, staying hydrated, and supporting gut health with probiotics. For more severe cases, consult a healthcare professional for personalized treatments.

Why do I suddenly smell mold?

Sources of excessive humidity that cause mildew and mold may include a leaky roof, leaky air conditioner, damp fabrics, poor ventilation, water leaks behind walls, cracked foundations, and water damage.

How to know if mold is behind a shower?

Discoloration, like dark spots or stains around grout lines or on the tiles themselves, may indicate mold growth beneath the surface. Loose or damaged tiles from moisture buildup are a common symptom of hidden mold. Recurring problems with bathroom condensation or dampness.

Why can I smell mold but no one else can?

If you smell a musty, earthy, damp scent, that could indicate a problem. Another interesting point is that some individuals are more sensitive to mold and will detect the odor, while others may not. It's similar to how some people will react strongly to scents like patchouli, while others barely take notice.

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