COVID-19 is a respiratory infection that typically causes flu-like symptoms, but one review of studies found
Some people develop a distorted sense of smell, a condition called parosmia. It sometimes persists for weeks or months after having COVID-19. Some people with parosmia describe everyday odors as “smoky” or unpleasant.
COVID-19 can also lead to another condition called phantosmia, where you experience odors that don’t exist. Some people with COVID-19 also experience hyposmia, which is a loss of smell that can range from partial to total.
Keep reading as we break down why COVID-19 sometimes causes a weird smell in your nose and how long it typically lasts.
Parosmia is a condition characterized by the alteration of your sense of smell. People with parosmia may find:
- their sense of smell isn’t as strong as usual
- they can’t detect certain scents
- they detect unusual or unpleasant odors when smelling everyday things
Parosmia is a potential complication of COVID-19. It may appear by itself or along with other nasal symptoms, like a
Some people who develop parosmia after having COVID-19 describe experiencing a burned or rotten odor when smelling their usual foods.
What’s parosmia like?
The first person, a 28-year-old, was admitted to the emergency room with:
Two days after his diagnosis, he completely lost his sense of smell and taste.
The man started regaining his taste 53 days after having COVID-19. He regained his smell on the 87th day but reported all his smells had a distorted odor like the smell of burned rubber.
The second person, a 32-year-old, was admitted to the emergency room with fatigue and body aches. Six days later she was readmitted with loss of taste, loss of smell, and mild shortness of breath.
Her sense of smell didn’t return until 72 days after acquiring the viral infection. When it did return, she found everyday objects smelled like onions.
How long does parosmia last?
Parosmia can potentially persist for weeks or months after developing COVID-19.
More than 75 percent of people also had an altered sense of taste and only 0.7 percent had other nasal symptoms, such as a runny or stuffy nose.
The researchers found that 89 percent of the study participants had full or partial recovery within 6 months, and most of them recovered to some degree within the first 2 months.
What causes parosmia?
The exact mechanism of how COVID-19 causes parosmia remains unclear.
It’s also theorized that damage to the neurons that carry information from your nose to your brain also plays a role.
- sewage: 54.5 percent
- rotten meat: 18.7 percent
- rotten eggs: 13.4 percent
- moldy socks: 7.5 percent
- citrus: 6.0 percent
The following were the most common triggers:
- most odors: 46.6 percent
- perfume: 22.4 percent
- any odor: 10.5 percent
- frying smell: 10.5 percent
- meat: 10.1 percent
- like cigarettes, or smoky
- like vinegar or ammonia
- distorted, strange, weird
- burned rubber
Some people with COVID-19 also experience phantosmia, which is when you experience smells that are not really there.
Most people who develop a strange smell after COVID-19 seem to recover within
It’s thought that recovery occurs when your damaged tissues repair themselves.
No particular treatment is known to be able to improve your sense of smell after COVID-19. Avoiding triggers can help minimize your symptoms.
Olfactory training involves sniffing a series of strong odors daily to help retrain your ability to smell.
Experiencing a burning smell is sometimes an early symptom of COVID-19, but it isn’t one of the typical symptoms. It’s thought that inflammation inside your nose caused by the viral infection may contribute to its development.
Along with loss or changes in your sense of smell, other COVID-19 nasal symptoms can include a runny or snuffy nose, although they’re not always present in a majority of cases.
It’s a good idea to see a doctor if you’re experiencing phantom smells after having COVID-19 or if everyday odors have a strange scent.
For most people, your sense of smell will likely return when your body is able to fully repair the damage the coronavirus (SARS-CoV-2) caused. A doctor can help you rule out other health conditions that may be contributing factors and recommend ways to help minimize your symptoms.
Some people experience a loss of smell or distorted sense of smell for months after having COVID-19. It’s not entirely clear why some people experience smell alteration, but it’s thought that injury to receptors in your nose and the neurons that lead from your nose to brain may contribute.
Most people seem to regain their sense of smell when their body heals from the damage the coronavirus caused.