Burning Smell in Your Nose: Causes and Treatment

Smelling something burning when nothing around you is actually on fire is a phenomenon called phantosmia, a type of olfactory hallucination in which you perceive an odor without any external source. It is surprisingly common and, in most cases, not dangerous. A population-based study of older adults found that roughly one in twenty people experience phantom smells, and the most frequently reported type was smoky or burnt.¹ The causes range from lingering effects of a viral infection to sinus problems to, rarely, neurological conditions that warrant medical attention.

How Phantom Burning Smells Differ From Other Smell Disorders

Smell can break down in several ways: you can lose sensitivity (the partial or complete inability to detect odors), you can perceive a real odor as distorted, or you can smell something that simply is not there.² That last category is phantosmia. It is distinct from parosmia, where a smell source exists but your brain misidentifies it. With parosmia, coffee might smell like sewage; with phantosmia, you smell sewage while sitting in an odor-free room.³ People who experience a burning smell in their nose are usually dealing with phantosmia, though the two conditions can overlap, and people sometimes struggle to tell them apart.

The phantom smell itself can take many forms. Some people describe burning rubber, cigarette smoke, or charred wood. Others report chemical or metallic odors. But burnt and smoky descriptions dominate. In a large survey of people with COVID-related smell distortion, the single most common keyword used to describe phantom smells was “burnt,” followed by “smoke” and “cigarette.”⁴ About three-quarters of respondents described their phantom smell in negative terms, and only around a fifth used neutral or positive language.

COVID-19 and the Wave of Burning Smells

Before the pandemic, phantosmia was a niche topic in otolaryngology clinics. COVID-19 changed that. Among people with COVID-related smell dysfunction, over a third reported phantom smells.⁴ That is a staggering number compared to the roughly five percent prevalence seen in the general older-adult population before the pandemic. If you developed a persistent burning smell in your nose sometime in 2020 or later, COVID is by far the most likely explanation, even if your initial infection was mild.

The timing is worth understanding. Phantosmia after COVID does not usually appear during the acute illness. Instead, it tends to set in gradually over the first couple of months of smell loss. Research shows the frequency of phantom smells increases sharply during roughly the first eight weeks of olfactory dysfunction, then levels off.⁴ People whose smell loss was partial rather than total, or fluctuating rather than steady, were more likely to develop phantosmia. Women were also at higher risk. This progressive onset can be confusing because you might think you are recovering from your smell loss only to have a phantom burning smell appear weeks later.

Follow-up data on COVID “smell long-haulers” paint a clear picture of how persistent these symptoms can be. In one study, phantosmia jumped from about ten percent at an initial check-in to roughly a quarter of patients at a later follow-up. Among people whose smell problems lasted longest, about a third reported phantom smells.⁵ One participant in that study gave a description that could have come from almost anyone with this condition: “Sometimes I can smell burning but no one else around me can.”

Sinus and Nasal Causes

Even without a viral trigger, chronic conditions in the nose and sinuses can produce smell distortions, including phantom burning odors. For a long time, doctors assumed that smell loss from sinusitis was simply a matter of swollen tissue blocking airflow to the olfactory nerve endings high in the nasal cavity. Research has challenged that assumption. Studies of sinus tissue have found significant damage to the olfactory lining itself in people with chronic rhinosinusitis, suggesting the problem is not just mechanical blockage but genuine injury to the sensory cells.⁶

When those sensory cells are damaged but not destroyed, they can misfire. This is one proposed pathway to phantosmia: damaged olfactory neurons sending abnormal signals, or failing to properly inhibit signals, which the brain then interprets as an odor.² Think of it loosely like tinnitus for the nose. Just as damaged hair cells in the ear can produce a phantom ringing sound, damaged olfactory neurons can produce a phantom smell. Chronic sinus infections, nasal polyps, and allergic rhinitis are all conditions that can inflict this kind of low-grade, ongoing injury to your smell receptors.

Neurological Causes Worth Knowing About

A burning smell in the nose is sometimes neurological in origin, and while these causes are less common, some deserve attention.

Epilepsy is the classic example. Certain types of seizures that originate in or near the temporal lobe, specifically a region called the uncus, can produce brief olfactory hallucinations. These are often described as burning rubber or something similarly unpleasant, and they typically last only seconds.⁷ The smell acts as an aura, a warning sign that a seizure is about to happen. If you suddenly smell something burning and then feel disoriented, lose awareness briefly, or notice involuntary movements, that pattern should prompt a conversation with a neurologist. But isolated phantom smells lasting minutes to hours, without any of those additional features, are far less likely to be seizure-related.

Migraine with olfactory aura is another possibility, though a rare one. Some people experience phantom smells before a migraine headache, and occasionally in isolation without a headache at all.⁸ If your burning smell episodes cluster around headache days, this connection is worth raising with your doctor, since treatment of the migraine itself can sometimes address the phantom smell.

Parkinson’s disease is a more concerning association. Phantom smell perception has been documented in people with Parkinson’s, with reported rates varying widely from under one percent to around eighteen percent of patients. Phantosmia in Parkinson’s sometimes co-occurs with visual or auditory hallucinations.⁹ This does not mean a burning smell signals Parkinson’s. The overwhelming majority of people with phantosmia do not have or develop the disease. But if the phantom smell accompanies other concerning symptoms like a tremor, stiffness, or changes in movement, it adds a piece to a picture a neurologist would want to see.

Medications and Polypharmacy

If you are over sixty and take several prescription medications, the medications themselves could be contributing to phantom smells. A study of U.S. adults found that people taking five or more prescription drugs had about seventy percent higher odds of perceiving phantom odors compared to people taking fewer medications.¹⁰ Among older adults specifically, diabetes medications, cholesterol-lowering drugs, and proton pump inhibitors (the kind used for acid reflux) each individually raised the odds of phantom smells by roughly seventy-five to ninety percent.

This does not necessarily mean you should stop a medication because you smell burning. Many of these drugs serve critical functions, and the mechanism behind the association is still unclear. But it is useful information if you have been trying to figure out why your phantom smell appeared around the time a medication was started or a dose was changed. It is worth mentioning to your prescribing physician.

Chemical and Environmental Exposure

Your olfactory neurons sit in an unusual anatomical position: they are directly exposed to the air you breathe, with relatively little protection compared to most nerve cells in the body. This makes them vulnerable to damage from toxic substances.¹¹ People who work around industrial solvents, heavy metals, or strong chemical fumes can sustain damage to these neurons over time. Acute exposures, like inhaling fumes from a fire or a chemical spill, can also injure them.

The resulting smell dysfunction can include phantosmia. If you trace the onset of a burning smell to a specific exposure event, or if your work regularly puts you in contact with airborne irritants, this history becomes important for diagnosis and management. Removing or reducing the exposure is the first step, though recovery can be slow because olfactory neurons regenerate gradually.

Who Seems Most Susceptible

Several patterns emerge from the research on who is more likely to experience phantom smells. Women are consistently more affected than men. The population-based study of older adults found that female sex was a significant risk factor.¹ The same pattern held in COVID-related phantosmia, where women were about sixty percent more likely to report the symptom.⁴

People with higher vascular risk, meaning conditions like high blood pressure, diabetes, or cardiovascular disease, also reported phantom smells more frequently in the population-based study.¹ And people who already had parosmia, the distortion of real smells, were more likely to also experience phantosmia. The relationship makes sense: both conditions stem from disrupted olfactory processing, just at different points in the chain.

The duration of phantosmia varies enormously. In the population study, about one in six people with phantom smells said they had experienced them their entire life. Another sixth reported having them for over a decade. And roughly a similar fraction said theirs had lasted less than a year.¹ For some people this is a brief episode; for others it becomes part of daily life.

Getting a Diagnosis

A clinical evaluation for phantosmia typically starts with a detailed history of when the smell began, how long episodes last, whether anything triggers them, and what other symptoms accompany them. A head and neck examination follows, including endoscopy to look inside the nasal passages. Formal smell testing, usually a scratch-and-sniff identification test administered to each nostril separately, helps determine whether there is measurable smell loss alongside the phantom perception. Imaging of the sinuses and brain is standard to rule out structural causes like polyps, tumors, or other intracranial abnormalities.¹²

One thing worth knowing: the work-up exists partly to catch the rare but serious causes. If imaging and the neurological exam come back clean, which they do in the vast majority of phantosmia cases, that is reassuring. It usually points to a peripheral cause, meaning the problem is in the nose itself rather than in the brain.

Treatment Options

Management of phantosmia depends heavily on its cause and severity. A systematic review of treatments for long-lasting phantosmia found three broad approaches: observation (simply waiting to see if the condition resolves on its own), medical therapy, and surgery.¹³

On the medical side, the drugs that have been tried include antiseizure medications, antimigraine drugs, antipsychotics, and even topical cocaine application to the olfactory area. If the underlying cause is sinus disease, treating the inflammation with nasal corticosteroids or other standard sinus therapies can sometimes reduce or eliminate the phantom smell.

Olfactory training is another approach that has gained traction, especially after the COVID pandemic increased demand. This involves deliberately sniffing a set of distinct odors, typically essential oils like rose, eucalyptus, lemon, and clove, for short sessions twice a day over several months. The idea is to retrain the olfactory neurons and their brain connections. One study found that combining olfactory training with a topical corticosteroid spray improved smell discrimination and identification significantly, while training alone produced more modest gains.¹⁴ Olfactory training is low-risk and inexpensive, making it a reasonable first step for many people.

For severe, unremitting phantosmia that does not respond to other treatments, surgical excision of the olfactory mucosa on the affected side has been performed. Long-term follow-up of patients who underwent this procedure showed short-term symptom improvement in the clear majority, and the surgery was generally considered safe. However, researchers emphasized that the procedure is technically challenging, carries significant risks, and should be performed only at specialized centers.¹⁵ It is genuinely a last resort, not something most doctors would recommend until years of other options have been exhausted.

The Psychological Weight of Phantom Smells

Phantosmia gets far less public attention than, say, chronic pain or hearing loss, but the emotional toll can be severe. When the phantom smell is a constant presence, and especially when it is something repulsive like burning or rotting, it can disrupt eating, social life, and mental health. In a qualitative study of people recovering from COVID-related smell dysfunction, respondents described being unable to eat enough, dreading restaurants, losing weight from malnutrition, and experiencing severe fatigue and depression.¹⁶ One participant described sunken eyes from not eating, an unrecognizable body, and the entire experience as the hardest thing they had ever been through.

The isolation can be compounding. When you tell people you are constantly smelling something that is not there, the reaction is sometimes dismissal or confusion. Smell disorders are invisible. Nobody can see your phantom smoke. There is no cast, no rash, no cough. If you are dealing with persistent phantosmia and finding it difficult, know that this reaction is well documented and widely shared among people with the condition, and it is a legitimate reason to seek both medical treatment and psychological support.

When to See a Doctor

A brief, isolated episode of smelling smoke or burning that resolves on its own and does not recur is usually nothing to worry about. Many people experience a fleeting phantom smell once or twice without it meaning anything sinister. You should seek medical attention if the burning smell is persistent or recurring over days to weeks, if it appeared after a head injury, if it is accompanied by seizure-like symptoms such as brief confusion or involuntary movements, or if you notice other neurological changes like tremor, difficulty with balance, or cognitive decline.

For most people, especially those whose phantom burning smell traces back to a respiratory infection or a period of sinus trouble, the prognosis is gradual improvement. Olfactory neurons are among the few nerve cells in the body that regenerate throughout life, which means the tissue that is misfiring today can, in many cases, repair itself over months. Recovery is often incomplete and slower than anyone would like, but the trajectory for the majority of post-viral phantosmia is toward resolution rather than permanence.

Zinc and Nutritional Factors

Zinc has long been recognized as essential to the enzymes that maintain normal smell and taste function. One of the key enzymes involved is zinc-dependent, and a shortage of zinc can produce smell loss or distortion.¹⁷ Some researchers have proposed that infections, including COVID-19, can trigger localized zinc depletion in the nasal lining as part of the immune response, contributing to the smell dysfunction that follows. Whether zinc supplementation helps once phantosmia has set in is less well-established, and high-dose zinc supplementation carries its own risks, including copper deficiency. Still, ensuring adequate zinc intake through diet or a standard multivitamin is a reasonable precaution if you are dealing with any form of smell disorder, and it is worth discussing with your doctor before reaching for high-dose supplements.

Other nutritional factors remain largely unexplored in the context of phantosmia specifically, but general olfactory health depends on the turnover of olfactory neurons, which is metabolically active tissue. Vitamin A deficiency has been linked to impaired smell in some studies, and adequate protein intake supports the regeneration process. None of these nutritional considerations is a standalone fix, but they form the background against which recovery takes place.