We all take our sense of smell for granted, don't we? But imagine how you would feel if you couldn't smell a flower, the delicious curry your mother was cooking, or the first raindrop that fell on the ground. This complete loss of smell is what we medically call anosmia . It's not as simple as you might think. When you lose your sense of smell, food tastes different, you can't smell a flower, and you can even get into a dangerous accident without even realizing it. Imagine what it would be like if you couldn't smell a gas leak, a fire, or spoiled milk.
How do we actually smell?
Simply put, our sense of smell is a combination of several processes. First, a scent released by something (for example, a flower) must stimulate special nerve cells at the top of our nose (called olfactory cells). Like little antennas, these cells pick up the scent information. These nerve cells then send that information to the brain, which is responsible for identifying exactly what it is. So, anything that interferes with this process, such as a stuffy nose, a blocked nasal passage, or damage to these nerve cells, can cause us to lose our ability to smell.
Importantly, our sense of smell directly affects our sense of taste. Without smell, our taste buds can only detect a few flavors. This can have a huge impact on our happiness and quality of life.
What are the causes of Anosmia?
The most common cause of loss of smell is nasal congestion due to things like a cold , allergies, or sinus infection. You may recall that this was also a major symptom of the recent COVID-19 infection. But apart from this, there are several other causes that can affect the condition of anosmia. Let's take a look at what they are.
| Reason | A simple explanation |
|---|---|
| Nasal polyps | These are small, non-cancerous growths that form in the nose and sinus cavities. They can block the nasal passages. |
| Accidents or surgeries | A severe injury to the head or nose or related surgery can damage the olfactory nerves. |
| Toxic chemicals | Long-term exposure to toxic chemicals like pesticides or solvents. |
| Some medications | Antibiotics, antidepressants, anti-inflammatories, and some heart medications can reduce the sense of smell as a side effect. |
| Drug use | The use of drugs taken through the nose, especially cocaine, damages the delicate membranes inside the nose. |
| Aging | Just like eyesight and hearing, the sense of smell can also naturally weaken as we age. This condition usually becomes apparent after the age of 60. |
| Other medical conditions | This condition can also be caused by diseases of the nervous system such as Alzheimer's disease, Parkinson's disease, and multiple sclerosis, nutritional deficiencies, and hormonal imbalances. |
| Radiation therapy | This can occur as a side effect of radiation therapy for head or neck cancer. |
Let's learn about diagnosis and treatment.
How do I know if I have this too?
The most obvious and obvious symptom is loss of smell. Some people don't suddenly lose their sense of smell. Instead, they start to notice changes in the way things smell. For example, the soap you use every day may smell less or may not smell at all.
Do you need to see a doctor?
Yes, absolutely. If you have a cold or allergies but you can't smell, or if it doesn't get better after a week or two, don't waste any time and see your doctor. Your doctor can use a special instrument to look inside your nose to see if there's anything like a piece of flesh or an infection.
Sometimes, you may be referred to an ENT (Ear, Nose, and Throat) doctor. A CT scan may also be needed to determine the exact cause.
What are the treatments?
- If it's due to a cold or allergies: This usually doesn't require any special treatment. Your sense of smell will return as the illness clears up. You can use decongestants for a few days. However, if the condition is severe or doesn't improve within a few days, seek medical advice immediately .
- If it's due to nasal polyps: You may need to have a minor surgery to remove these. After the surgery, your sense of smell will return.
- If you suspect it's a medication: If you think it's a medication you're taking, talk to your doctor about it . He or she may be able to give you an alternative medication. Never stop taking a prescribed medication for any reason without talking to your doctor.
- Incurable cases: In some cases, especially with aging, anosmia may not be completely curable. However, there are things you can do to live safely and happily with the condition.
- Install smoke alarms in your home and workplace.
- Be very careful with leftover food . If there is even the slightest doubt about the safety of a food, don't eat it.
- If you smoke, quit today. Smoking impairs your senses, especially your sense of smell.
Take-Home Message
- Anosmia can be something temporary, like a cold , or it can be an early sign of a serious illness, like Alzheimer's.
- If you have a bad breath for more than two weeks without an obvious reason (such as a cold, allergies), definitely see a doctor.
- The sense of smell is very important for our sense of taste and for our safety (detecting fire, spoiled food).
- If you suspect that your sense of smell is being reduced due to a medication prescribed by a doctor, never stop taking it without talking to your doctor.
- If you have an incurable anosmia condition, it is very important to take safety measures, such as installing smoke alarms.
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