Does Parkinson’s Cause Loss of Smell? Causes, What It Means & What You Can Do

When most people think about Parkinson’s disease, they think about tremors, stiffness, or slowed movement. But Parkinson’s can also affect the senses. A reduced or lost sense of smell is a common non-motor symptom of Parkinson’s and may appear years — sometimes even decades — before a diagnosis.
Could losing your sense of smell be connected to Parkinson’s — and is there anything you can actually do about it? Understanding why it happens can help you recognize an important symptom and find ways to maintain nutrition, safety, and quality of life.

What Is Loss of Smell Called?
A reduced ability to smell is called hyposmia. A complete inability to smell is called anosmia.
Changes in smell are considered a non-motor symptom of Parkinson’s. Research and clinical experience show that impaired smell is very common among people with Parkinson’s, although the degree of impairment varies from person to person.

Not everyone with a reduced sense of smell has Parkinson’s. Allergies, sinus problems, infections, nasal conditions, medications, aging, and other neurological conditions can also affect smell.
Can Loss of Smell Be an Early Sign of Parkinson’s?
Yes. Loss or reduction of smell can occur years before the more familiar movement symptoms of Parkinson’s appear.
​
However, having a poor sense of smell by itself does not mean someone has Parkinson’s. It is one potential clue among many, not a diagnostic test.
If you notice a persistent change in your sense of smell — especially along with symptoms such as constipation, sleep changes, tremor, stiffness, slowed movement, balance problems, or changes in handwriting — discuss it with your healthcare provider.

​How Does Parkinson’s Affect Taste?
You may think your sense of taste has disappeared when the underlying problem is actually your sense of smell.
Smell plays an important role in how we experience flavor. When smell is reduced, foods may seem bland or less enjoyable. This can lead some people to lose interest in eating, change their food preferences, or experience unintended weight changes.
That makes nutrition an important consideration when managing Parkinson’s-related smell loss.
​
What Can You Do About Loss of Smell?
Unfortunately, there is currently no specific treatment that reliably restores a lost sense of smell caused by Parkinson’s.
But there are practical things you can do.
Talk With Your Healthcare Provider
Don't automatically assume that smell loss is caused by Parkinson’s. Your healthcare provider can consider other possible causes, including sinus or nasal problems, infections, medications, or other conditions.

Pay Attention to Nutrition
If food no longer tastes or smells as appealing, experiment with different textures, temperatures, colors, and naturally flavorful foods.
If you are losing weight, have little appetite, or are struggling to eat enough, ask your healthcare provider or a registered dietitian for help.
Be Careful With Food Safety
Smell loss can make it harder to detect spoiled food or odors such as smoke or gas.
Check expiration dates carefully, use food-storage guidelines, and make sure smoke and carbon-monoxide detectors are working properly.
Keep Track of Changes
If your sense of smell changes significantly, make a note of when you first noticed it and whether it is getting better or worse. Sharing this information with your healthcare team can help them understand your overall pattern of symptoms.
Can Parkinson’s Medication Restore Smell?
Parkinson’s medications are primarily used to manage symptoms, and there is not good evidence that standard Parkinson’s medication reliably restores impaired smell.
Do not change or stop Parkinson’s medication because of smell loss without talking with your healthcare provider.

Questions People Ask About Parkinson’s and Smell Loss
1. Is loss of smell an early sign of Parkinson’s?
Yes. It can occur years before a Parkinson’s diagnosis, although smell loss alone does not mean someone has Parkinson’s. 
2. Does everyone with Parkinson’s lose their sense of smell?
No. The degree of smell impairment varies, and not everyone experiences the same symptoms.
3. Can Parkinson’s cause a complete loss of smell?
It can cause significant impairment, although many people experience reduced rather than completely absent smell.
4. Can smell loss be reversed?
There is currently no specific treatment proven to restore smell loss caused by Parkinson’s.
5. Why does food taste different with Parkinson’s?
Because smell contributes significantly to flavor perception, reduced smell can make food seem less flavorful or enjoyable.
​
Conclusion
Loss of smell may not be as visible as tremor or difficulty walking, but it is an important Parkinson’s symptom. It can appear early, affect enjoyment of food, and sometimes contribute to appetite or weight changes.
While there is currently no specific treatment to restore Parkinson’s-related smell loss, recognizing the symptom, checking for other possible causes, protecting food safety, and paying attention to nutrition can make a meaningful difference.
Most importantly, don't ignore changes in smell. Bring them up with your healthcare team as part of the bigger picture of living well with Parkinson’s.

Why Support Matters
A diagnosis of any form of Parkinson’s can feel overwhelming. But with the right support and resources, individuals can maintain independence, quality of life, and emotional well-being.
For resources, referrals, and support in navigating Parkinson’s and related conditions, contact the Parkinson’s Association of Southwest Florida at www.paswfl.org or call 239-417-3465.
For over 25 years, PASWFL has provided free, high-quality services and programs to individuals and families touched by Parkinson’s disease in Southwest Florida. Their goal is simple: help people live well with PD, regardless of where they are in their journey.

Each week, PASWFL offers more than 25 free programs and support groups, including:

• Wellness and fitness classes
• Speech Exercise classes
• Educational seminars
• Support for care partners
• Support groups

There are no fees to become a member, and PASWFL welcomes anyone touched by PD.

Take the First Step Toward Living Well
If you suspect early Parkinson’s or have been recently diagnosed, you don’t have to face it alone.
👉 Click here to sign up for the PASWFL newsletter:
https://parkinsonassociationswfl.org/signup-enews.html
👉 Click here to become a member…it’s free and confidential:
https://parkinsonassociationswfl.org/signup.html
To learn more, visit www.paswfl.org and discover the power of support, education, and community.