How could we improve it?

This article contains false or inaccurate information.

Please tell us what was incorrect.

Please note that you do not need to fill this detail if it's inconvenient for you. Click Send My Opinion below to continue reading our site.
This article doesn't provide enough info.

Please tell us what was missing.

Please note that you do not need to fill this detail if it's inconvenient for you. Click Send My Opinion below to continue reading our site.
Hmm... I have a question.

We’re unable to offer personal health advice, diagnosis, or treatment, but we welcome your feedback! Just type it in the box below.

If you're facing a medical emergency, call your local emergency services immediately, or visit the nearest emergency room or urgent care center.

Or copy link


Taste and Smell Disorders: What Happens If You Lose Your Sense of Smell and Taste?

Know the Basics|Causes|Risks|Treatment|Conclusion
Taste and Smell Disorders: What Happens If You Lose Your Sense of Smell and Taste?

Know the Basics

Imagine a world where food didn’t taste or smell like anything at all. It wouldn’t be a world that anyone would want to exist in, would it? Both your sense of taste and smell play important roles in improving your quality of life and maintaining your health.

But have you ever wondered what happens if a person’s sense of smell and taste malfunction or just stop working? It’s not as rare as you think it might be. A study conducted in the United States showed that prevalence of smell disorder was at about 13.5% while the prevalence for taste disorders was at 17.3%. Doctors even suggest that there are more people who suffer from taste and smell disorders but just don’t seek treatment.

Learn more about what is the cause of loss of taste and smell disorders, their symptoms, and how they can affect your overall health and well-being.

Taste and Smell: How It Happens

The way the sense of taste and sense of smell works are very different. However, both of these senses are closely connected to one another which is what makes the experience of tasting possible.

Both the process of tasting and smelling start with chemicals called tastants or odorants. These are chemicals that can be found in food or in the air that can be detected by the nose or the mouth. When you take a bite of something, the taste buds pick-up the tastants in the food you just ate. The taste buds then send signals to the brain and that gives us a perception of taste.

Similarly, cells in the nose detect odorants in the air. These cells then send messages to the brain that tell you what it smells like.

As you chew food, aroma also wafts up to the roof of the throat to the nose. This also helps in the process of tasting food that you eat. This is also the reason why your sense of taste isn’t the same when you have a cold or when your nose is stuffy. Smell is important in the process of detecting the flavor of the food.

For this reason, many people think that they have a taste disorder but are then diagnosed with a smell disorder.

Common types of smell and taste disorders are the following:

Smell Disorders:

  1. Hyposmia: Hyposmia is a decreased or reduced ability to smell things.
  2. Anosmia: Anosmia is the condition where a person can’t smell anything, or has a complete loss of smell.
  3. Parosmia: Parosmia is characterized by a distorted sense of smell. People with parosmia complain of things smelling like mould, rotting flesh, or even chemicals when these things don’t actually smell that way.
  4. Phantosmia: When a person has phantosmia, they often experience “phantom smells” of objects that aren’t there.

Nervous System Disorders: All You Need to Know

Taste Disorders

  1. Phantom taste perception: This is the condition commonly referred to as having a “bad taste in your mouth” even if there isn’t anything in your mouth.
  2. Hypogeusia: A reduced ability to detect different taste like sweet, salty, bitter, or savory (umami).
  3. Ageusia: A complete loss of sense of taste.

Complete loss of either sense of taste or smell is quite rare. Suffering from a smell or taste disorder can significantly affect the quality of your life.


What Is the Cause of Loss of Taste and Smell?

Some people are born with smell or taste disorders while some develop them after an injury. Smell or taste disorders can also tell you a lot about your health, as these may signal underlying conditions such as:

  • Nervous system disorders
  • Poor nutrition
  • High blood pressure
  • Obesity
  • Diabetes

If you’re wondering if what is the cause of loss of taste and smell, it can be attributed to a number of factors namely:

  • Smoking cigarettes
  • Radiation therapy (for chemotherapy)
  • Doing drugs
  • Exposure to some types of chemicals
  • Nasal polyps
  • Hormonal changes
  • Head trauma or injury
  • Illnesses like allergic rhinitis, sinus infection, colds, or flu.

Some specific causes of taste disorders are:

  • Middle ear infections
  • Dental health problems
  • Poor oral hygiene

Some specific causes of smell disorders are:

  • Aging
  • Exposure to harmful chemicals like solvents or pesticides


Risks of Smell and Taste Disorders

The sense of taste and smell are things that most people often take for granted. However, if either of the two starts to have problems, then this may have consequences on your overall health as well.

Having a taste disorder can result in a person eating something that is spoiled or rotten since they weren’t able to tell from the taste. If you’re diabetic or suffer from a condition where a diet must be followed, then eating disorders might cause problems. Some food might seem less sweet, which can result in adding too much sugar or other condiments. Taste disorders might also cause a person to lose or gain weight.

Smell disorders can also have negative effects on a person’s health. A person with a smelling disorder might start eating too little or too much. Aside from that, a person suffering from a smelling disorder might not be able to smell the smoke coming from fire or dangerous fumes that could put their lives in danger.


Treatment and Management of Smell and Taste Disorders

A specialist called a otorhinolaryngologist who is an expert on diseases affecting the ears, nose, throat, head, and neck will be able to administer the appropriate tests to determine whether or not you have a smell or taste disorder.

Treatment for smell and taste disorders often involve treating an underlying cause like medication or poor oral hygiene. For blockages in the nasal passage, surgery may be advised to remove nasal polyps. It’s important to note that some people suffering from smell or taste disorders can recover while others won’t.


Smell and taste disorders can have a significant effect on a person’s weight, happiness, and overall health. Causes of smell and taste disorders can vary from person to person but are usually signs of an underlying condition. If you suspect that you’re suffering from a smell or taste disorder, it’s best to consult your doctor as soon as possible.

Hello Health Group does not provide medical advice, diagnosis or treatment.

Picture of the authorbadge
Written by Tracey Romero Updated Jun 10
Medically reviewed by John Paul Ferolino Abrina, M.D.