You smell cinnamon when there is no cinnamon around. This is called phantosmia — a phantom smell. Your brain is creating the scent of cinnamon even though nothing in your environment is producing it. This happens because your olfactory system, which controls your sense of smell, is sending false signals to your brain. The causes range from sinus infections to neurological conditions, and most of them are not serious. Understanding why this is happening to you starts with knowing how your smell system works and what can disrupt it.
What Causes Phantosmia and Phantom Smells Like Cinnamon?
Phantosmia happens when the nerves in your nose or the smell-processing parts of your brain get confused. Your olfactory receptors pick up a signal that is not there, or your brain misinterprets normal nerve activity as a specific smell. Cinnamon is a common phantom smell because it is a strong, familiar scent that your brain can easily reconstruct.
Research published in the journal Chemical Senses found that phantom smells affect about 6% of people over age 40. The most common phantom smells reported are burnt, smoky, or chemical odors. But sweet smells like cinnamon, vanilla, and chocolate also appear frequently. The exact smell depends on your personal memory and brain wiring.
Is Smelling Cinnamon When Nothing Is There a Sign of Something Serious?
Most of the time, no. The CDC reports that phantom smells are usually caused by temporary issues like sinus infections, allergies, or colds. These conditions inflame the nasal passages and disrupt the olfactory nerves. Once the infection clears, the phantom smell usually goes away.
However, there are cases where phantosmia signals something more serious. Head injuries, seizures, and brain tumors can all cause phantom smells. The key difference is that serious causes almost always come with other symptoms like headaches, vision changes, confusion, or loss of consciousness. If you smell cinnamon and have no other symptoms, it is very unlikely to be a brain tumor or stroke.
A 2018 study in JAMA Otolaryngology found that only about 2% of phantosmia cases were linked to serious brain conditions. The vast majority were from nasal or sinus issues. Still, if the smell persists for more than a few weeks or gets worse, you should see a doctor.
Why Do I Keep Smelling Cinnamon After a Cold or Sinus Infection?
This is the most common reason. When you have a cold or sinus infection, the lining of your nose swells. This swelling can damage or irritate the olfactory nerve endings. Even after the infection clears, those nerves may take weeks to heal. During healing, they can fire off random signals that your brain interprets as a smell.
Your brain picks cinnamon because it is a familiar, pleasant scent stored in your memory. The olfactory bulb, which sits right above your nose, connects directly to the parts of your brain that handle memory and emotion. When damaged nerves send random signals, your brain searches for a match in your smell memory. Cinnamon is a common match because most people have smelled it many times.
This type of phantosmia usually resolves on its own within a few weeks. Some studies suggest that smell training — deliberately sniffing strong scents like lemon, rose, or clove — can speed up recovery. The American Academy of Otolaryngology recommends smell training for people with smell loss, though evidence for phantom smells specifically is limited.
Can Medications or Medical Treatments Cause Phantom Cinnamon Smells?
Yes, some medications list phantom smells as a side effect. Antibiotics, antidepressants, and blood pressure medications have all been reported to cause phantosmia in rare cases. The exact mechanism is not well understood, but it likely involves how these drugs affect nerve signaling in the brain or nasal passages.
Chemotherapy and radiation treatment for head and neck cancers can also damage olfactory nerves. Patients undergoing these treatments sometimes report phantom smells, including sweet or spicy scents like cinnamon. The National Cancer Institute notes that these changes are usually temporary and improve after treatment ends.
If you started a new medication around the same time the cinnamon smell appeared, that could be the cause. Do not stop taking prescribed medication without talking to your doctor. They may be able to switch you to a different drug or adjust your dose.
What Does Research on Phantom Smells Tell Us About Why Cinnamon Appears?
Research on phantosmia is still limited, but some patterns have emerged. A 2021 review in Current Opinion in Otolaryngology & Head and Neck Surgery found that phantom smells are more common in women than men, and they peak between ages 40 and 60. The same review noted that people with anxiety or depression are more likely to report phantom smells, though it is unclear if this is a direct cause or just a correlation.
One theory is that the brain’s olfactory system is constantly trying to predict what smells it should be sensing. When there is damage or inflammation, the prediction system misfires. Cinnamon may appear because it is a “safe” scent — your brain fills in a familiar, non-threatening smell rather than something alarming like smoke or decay.
Another theory comes from research on epilepsy. Some people with temporal lobe epilepsy experience phantom smells right before a seizure. These smells are often described as burnt rubber, sulfur, or cinnamon. If your phantom cinnamon smell is followed by confusion, staring spells, or unusual sensations, it could be a seizure warning sign. This is rare but worth knowing.
What to Do When You Keep Smelling Cinnamon
If the smell lasts less than a few weeks and you have no other symptoms, you can usually wait it out. Keep your nasal passages clear with saline rinses or a humidifier. Avoid strong irritants like smoke and perfume that could further irritate your olfactory nerves.
If the smell lasts longer than a month or comes with other symptoms, see your primary care doctor. They may refer you to an ear, nose, and throat specialist. The ENT can perform a nasal endoscopy to check for polyps, tumors, or chronic inflammation. In rare cases, they may order an MRI to look at your brain.
| Duration of Phantom Smell | Likely Cause | What to Do |
|---|---|---|
| Less than 2 weeks | Cold, sinus infection, allergies | Wait, use saline rinse, rest |
| 2 weeks to 3 months | Nerve healing, medication side effect | See primary care doctor |
| More than 3 months | Chronic sinusitis, polyps, neurological issue | See ENT specialist |
| Sudden onset with other symptoms | Seizure, head injury, stroke | Go to emergency room |
There is no FDA-approved treatment specifically for phantosmia. Some doctors prescribe antiseizure medications or antidepressants to calm overactive nerves, but evidence for their effectiveness is weak. The most reliable treatment is addressing the underlying cause — clearing a sinus infection, stopping an offending medication, or letting nerve damage heal naturally.
Common Misconceptions About Phantom Cinnamon Smells
One common myth is that phantom cinnamon smells mean you have a “spiritual gift” or are sensing something supernatural. There is no scientific evidence for this. The experience can feel significant because smell is so tied to memory and emotion, but it is a biological process, not a mystical one.
Another misconception is that phantom smells always mean you have COVID-19. While COVID-19 can cause smell distortions, the typical COVID-related smell issue is loss of smell (anosmia) or distorted smells (parosmia), not persistent phantom smells. A 2022 study in Rhinology found that phantosmia was less common in COVID patients than other smell disorders.
Some people believe that phantom smells are a sign of early dementia or Alzheimer’s disease. Research from the University of Chicago found that people who cannot identify common smells are at higher risk for cognitive decline, but phantom smells are different from smell identification problems. There is no strong evidence linking phantosmia alone to dementia.
If you keep smelling cinnamon and it bothers you, keep a simple log. Write down when it happens, what you were doing, and how long it lasts. This information helps doctors figure out the cause. Most phantom smells go away on their own. For the small number that do not, there are specialists who can help.
Frequently Asked Questions
Can anxiety cause phantom cinnamon smells?
Anxiety can make you more aware of phantom smells, but it is not a direct cause. People with high anxiety levels report phantosmia more often, likely because stress affects nerve signaling.
How long does phantom cinnamon smell usually last?
Most phantom smells last a few days to a few weeks. If it continues past three months, you should see an ENT specialist to rule out chronic issues.
Should I see a doctor for smelling cinnamon when there is none?
See a doctor if the smell lasts more than a month or comes with headaches, vision changes, confusion, or seizures. Otherwise, waiting and monitoring is usually safe.
Can smell training help stop phantom cinnamon smells?
Smell training is more proven for smell loss than phantom smells, but some people report improvement. It involves sniffing strong scents like lemon, rose, clove, and eucalyptus twice daily.
