A blocked nose and reduced sense of smell are familiar companions of a cold. But what happens when the cold is gone and your sense of smell still has not returned?
A temporary change in smell can occur during or after an upper respiratory infection. Sometimes it improves as nasal inflammation settles. In other cases, persistent loss of smell may have another explanation and deserves assessment rather than being assumed to be part of the recovery process.
Key takeaways
- Loss of smell after a cold can have several possible causes, including lingering nasal inflammation or other nasal and sinus conditions.
- Recovery does not happen at exactly the same pace for everyone.
- Persistent or worsening symptoms may warrant an assessment, particularly when other nasal or neurological symptoms are present.
- An ENT consultation can help determine whether the problem is related to the nose, sinuses or another part of the smell pathway.
Is it normal for your sense of smell to lag behind your cold?
Yes, it can happen. Your sense of smell depends partly on odour molecules reaching specialised smell-sensing cells high inside the nose. When a cold causes congestion or inflammation, this process can be affected.
Even after other symptoms such as a runny nose, sore throat or cough have settled, your sense of smell may not immediately feel completely normal.
However, there is no single point at which everyone should expect their smell to return. The more important thing is to track whether it is gradually improving, staying unchanged or getting worse.
If there is no meaningful improvement as time passes, an assessment may help identify why.
What are some reasons for the loss of smell caused after a cold?
A recent infection is not necessarily the whole explanation. Some possible causes can include,
- Persistent nasal inflammation or congestion
- Sinus problems that interfere with airflow to the smell-sensing area
- Nasal polyps or other structural issues inside the nose
- Post-viral changes affecting the smell pathway
- Certain medicines or other medical conditions
This is why persistent loss of smell should not automatically be treated as a simple blocked-nose problem.
When should you stop waiting and see an ENT doctor?
There is no set rule that applies to everyone regarding waiting for an assessment. You should consider seeking medical assessment if your sense of smell remains reduced without clear improvement, particularly if the problem is affecting your appetite, enjoyment of food or everyday life.
An earlier assessment may also be appropriate if the loss of smell occurs alongside symptoms such as,
- Persistent or significant nasal blockage
- Recurrent sinus symptoms
- Facial pain or pressure
- Nosebleeds or unusual nasal symptoms
- Changes affecting taste as well as smell
- Other symptoms that concern you
The assessment can help establish whether there is an identifiable nasal or sinus cause and whether further evaluation is appropriate.
Does persistent loss of smell always need treatment?
Not always as the treatment depends on the underlying cause. For example, if nasal inflammation or congestion is contributing to reduced smell, management may focus on the nasal or sinus problem. If the cause appears different, the approach may also be different.
An ENT doctor may ask about the timing of the cold, how your symptoms have changed, your nasal symptoms, medications and medical history. Depending on the situation, examination or further investigations may be considered.
The aim is not simply to treat the symptom in isolation, but to understand what may be interfering with your sense of smell.
Frequently Asked Questions
Can a cold permanently affect your sense of smell?
A change in smell can persist after a viral infection in some people. Persistent symptoms should be assessed rather than assuming that recovery will follow a fixed timeline.
Why can I taste food but not smell it properly?
Smell contributes significantly to how we perceive flavour. A reduced sense of smell can therefore make food seem less flavourful, even when basic taste sensations remain.
Should I be concerned if my sense of smell is getting worse?
A worsening symptom deserves medical attention, particularly if it is accompanied by persistent nasal symptoms or other unusual changes.
Can nasal congestion cause loss of smell?
Yes. When congestion or inflammation interferes with the movement of odours through the nose, smell may be reduced. Other causes are also possible.
What should I do if my smell has not returned after my cold?
If there is no clear improvement, consider arranging an assessment with an ENT doctor to determine the possible cause and whether further evaluation is needed.
Book a consultation to get your sense of smell checked
You do not have to wait indefinitely for a symptom to resolve before asking what is causing it. If your cold has passed but your sense of smell remains reduced or is not showing clear improvement, an ENT assessment can provide a more individualised understanding of the problem.
For patients in Singapore, KO CHAN ENT Sinus & Sleep Centre provides ENT assessment for concerns involving the nose, sinuses and sense of smell. You may consider booking a consultation with Dr Chan if persistent loss of smell is affecting your daily life or you are unsure why it has not returned.
