One side of your nose is always blocked and the other is completely normal? It might happen more at night, when lying in bed or when waking up in the morning. This often can pass by itself, sometimes it lasts for days or weeks and makes breathing uncomfortable.
A one-sided blockage of the nasal passages may occur due to the natural nasal cycle, allergies, deviated nasal septum, nasal polyps or nasal inflammation. In not all cases it is serious but if there is persistent blockage on the same side, it should not be overlooked.
When you have a blocked nose for whatever reason, it’s important to know the possible reasons to help you determine when you should just manage the blocked nose at home and when you should seek an ENT specialist’s advice.
What is causing one nostril to be blocked all the time?
The first thing to understand if you feel one of your nostrils is always blocked is that your nasal breathing does change as the day goes.
The nasal cycle is a normal phenomenon that describes the alternation of more swelling in one nostril with less in the other. Over time the sides take turns, typically without you being aware of it.
If the same nostril stays blocked for a long time, however, another cause may be involved.
Common causes include:
- A deviated nasal septum
- Allergic rhinitis
- Swelling of the nasal tissues
- Nasal polyps
- Long-term inflammation or sinusitis.
- A narrowing of the nose, either in the nasal cavity or the nasal passages.
- The presence of a foreign body, especially in children.
- Sometimes, a peculiar growth in the inside of the nose.
The location, length and intensity of symptoms may help an ENT specialist identify what may be causing the issue.
Common Causes of One-Sided Nasal Blockage
1. Deviated Nasal Septum
The nasal septum is the wall of cartilage and bone that separates the two nostrils. When it bends or shifts to one side, it can make one nasal passage narrower than the other.
A deviated nasal septum may develop naturally or result from an injury to the nose. Some people have no noticeable symptoms, while others experience persistent blockage, mouth breathing, or difficulty sleeping comfortably.
You may notice that one nostril feels more blocked than the other, particularly when you have a cold or allergies that cause additional swelling.
Treatment depends on the severity of the symptoms. Mild cases may be managed by treating associated inflammation, while significant structural obstruction may require an ENT assessment to determine whether surgery is appropriate.
2. Allergies and Nasal Inflammation
Allergic rhinitis can cause swelling inside the nose, making it difficult for air to pass freely. Common triggers include dust mites, pollen, mould, and animal dander.
Although allergies often affect both nostrils, the blockage may feel worse on one side, especially if that nasal passage is already narrower.
Other symptoms may include:
- Sneezing
- A runny nose
- Itching inside the nose
- Watery eyes
- Reduced sense of smell
If your symptoms become worse during certain seasons or after exposure to dust, allergies may be contributing to the problem.
3. Nasal Polyps
Nasal polyps are soft, usually non-cancerous growths that develop in the lining of the nose or sinuses. They are associated with ongoing inflammation and may cause persistent congestion, reduced smell, and difficulty breathing through the nose.
Small polyps may not cause noticeable symptoms. Larger polyps or polyps positioned in a particular area can obstruct airflow.
Although nasal polyps often affect both sides, one side may feel more blocked than the other. A persistent, one-sided mass or obstruction deserves medical examination rather than being assumed to be an ordinary nasal polyp.
An ENT specialist can examine the nasal passages and recommend appropriate treatment.
4. Sinus Inflammation or Infection
Inflammation affecting the nasal passages and sinuses can lead to congestion, pressure, nasal discharge, and a reduced sense of smell.
During a common cold or an episode of sinus inflammation, one nostril may feel more blocked than the other. Symptoms can change throughout the day as swelling and mucus levels fluctuate.
However, persistent blockage limited to the same side, especially when accompanied by recurring bleeding, foul-smelling discharge, facial swelling, or significant pain, requires medical evaluation.
If you experience congestion that continues for an extended period, an ENT specialist can determine whether sinus disease or another condition is responsible.
5. The Normal Nasal Cycle
From time to time, one nostril is obstructed only due to the regular nasal cycle.
You can expect your nasal passages to swell and shrink on a regular basis, as they are natural. One side might feel wider and the other narrower and then it alternates.
This is a normal and not necessarily medical process.
If there is a constant blockage on the same side of the nose or if you experience other symptoms or find it hard to sleep, however, it is advisable to get checked out rather than thinking that the nasal cycle is to blame.
6. Structural Narrowing Inside the Nose
Other structural deformities may obstruct air passages in one nostril, except for deviated septum. These can be due to a narrowed nasal valve, changes after a nose injury or from a previous nose surgery.
Individuals who suffer from structural narrowing may find that breathing through one nostril is more challenging when exercising, sleeping, or during times of nasal inflammation.
An ENT exam can be useful to differentiate between the structural obstruction and swelling due to allergy or infection.
7. A Foreign Object in the Nose
Foreign object in the nose is a significant possibility, especially in young children.
A child could suffer from a blockage on one side, discharge from one nostril or an offensive smell. Occasionally the child may be unable to recall or describe what has happened.
Never attempt to remove an object with cotton buds, tweezers or other instruments that are pushed far up the nostril. Get immediate medical help. If there is an opportunity that a button battery or a magnet could be in the nose, it’s a case of emergency evaluation.
One Side of Nose Blocked at Night: Why Does It Happen?
When one nostril is obstructed during the night, there’s a few reasons.
Lying down can alter blood flow and body position which can impact swelling inside the nose. A normal nasal cycle can also be more obvious when you’re trying to sleep.
Other factors may be:
- Bedding dust mites that cause allergies.
- Nasal inflammation
- A deviated septum
- Nasal polyps
- Existing sinus conditions
It is possible that the blocked side will alternate as you change positions in bed. This can be related to the position changes and the nasal cycle but does not give cause.
If you have a problem with constant night time obstruction, sleep problems, and frequent mouth breathing, see an ENT to see if treatment is required.
Why Is One Side of My Nose Blocked Every Morning?
One side of the nose being blocked can make it hard to get a good night’s sleep, particularly if you breathe easier after getting out of bed.
This may be due to normal nasal cycles, allergens in your bedroom, dry air or a congenital narrowing of the nose.
If allergies are present, you might also experience sneezing, itching or a runny nose upon waking.
If allergens are the cause of your symptoms, you can help by keeping your sleeping area clean, washing your bedding frequently, and avoiding known allergens. Some people may find that using saline nasal sprays temporarily helps with congestion.
If the same nostril is congested each morning for weeks, if symptoms persist despite simple treatments, a medical evaluation may be warranted to determine the cause of the congestion.
How to Open One Side of a Blocked Nose
When looking into how to open blocked nose, the best way to do so will depend on the cause of the blockage.
If the congestion is just from a cold or allergies, the following tips can be helpful:
1. Try a saline nasal spray. Saline can help moisturise the nasal lining and loosen mucus. If you use a nasal irrigation device, use sterile, distilled, or previously boiled and cooled water, and keep the device clean.
2. Reduce exposure to allergens. If dust or pollen triggers your symptoms, reducing exposure may help control inflammation.
3. Stay hydrated. Drinking enough fluids can help prevent dehydration and may make thick secretions easier to manage.
4. Avoid smoke and irritants. Tobacco smoke, strong fragrances, and air pollution can irritate the nasal lining.
5. Ask about suitable medication. An ENT specialist or other qualified healthcare professional may recommend treatment based on whether your symptoms are caused by allergies, inflammation, or another condition.
Don’t use nasal decongestants for more than the instructions on the product or as recommended by your clinician. Some sprays may cause a ‘rebound’ effect which can worsen nasal congestion if they are over-used.
If this is because there is a large structural problem, home remedies may not work.
When Should You See an ENT Specialist?
Occasional nasal congestion often improves as the underlying cold or irritation settles. Persistent or unexplained one-sided blockage deserves closer attention.
Arrange an ENT assessment if:
- One nostril remains blocked for several weeks.
- The blockage repeatedly affects the same side.
- You experience frequent nosebleeds or blood-stained discharge.
- You notice foul-smelling discharge from one nostril.
- Your sense of smell has significantly decreased.
- You experience recurring facial pain or pressure.
- Nasal blockage interferes with sleep or everyday activities.
- Symptoms persist despite appropriate treatment.
Seek urgent medical care if nasal blockage is accompanied by swelling around the eye, vision changes, severe headache, or significant facial swelling. A suspected foreign object, especially a button battery or magnet in a child’s nose, also requires urgent attention.
Persistent one-sided obstruction does not automatically mean a serious condition is present. However, identifying the cause is important so that appropriate treatment is not delayed.
How Is One-Sided Nasal Blockage Diagnosed?
An ENT specialist will usually begin by asking about your symptoms, when they started, whether the blockage changes sides, and whether you have allergies, previous nasal injuries, or other related problems.
The examination may include:
Medical history: Your doctor will review the duration of the blockage, associated symptoms, medications, and relevant medical history.
Nasal examination: The doctor will inspect the nasal passages for swelling, discharge, structural narrowing, or other visible abnormalities.
Nasal endoscopy: When necessary, a thin instrument with a camera may be used to examine areas that are difficult to see during a routine examination.
Imaging: A CT scan or other imaging may be recommended when the findings suggest a sinus problem, structural issue, or another condition that requires further investigation.
Not everyone needs every test. The appropriate evaluation depends on your symptoms and the findings during the clinical examination.
Treatment Options for One-Sided Nasal Blockage
Treatment depends on the cause rather than simply which nostril is blocked.
- Allergy-related obstruction: Avoiding triggers and using appropriate allergy treatments may help.
- Inflammation: Saline preparations or prescribed nasal medication may be recommended, depending on the condition.
- Nasal polyps: Treatment may include medication or, in selected cases, surgery.
- Deviated nasal septum: Surgery may be considered when structural obstruction causes significant symptoms and other appropriate measures are insufficient.
- Sinus disease: Treatment depends on whether the condition is acute, chronic, inflammatory, or associated with another underlying problem.
- Foreign object: Removal by an appropriately trained healthcare professional may be necessary.
An ENT specialist can explain the available options, their benefits and risks, and whether further investigation is required.
Final Thoughts
A one-sided nasal blockage may be caused by such simple things as a normal nasal cycle or by diseases including allergies, deviated septum, nasal polyps, and sinus inflammation.
If you think your nose is always blocked on one side, listen for how long it is blocked and if it ever switches sides; if there are other symptoms, listen for those as well.
Simple solutions can help improve temporary congestion, however if the congestion persists, it is the time to seek the advice of an ENT specialist. Determining the cause is most important to select the right treatment and to live comfortably.
Frequently Asked Questions
Is it normal for one side of the nose to be blocked?
Yes, there are temporary changes to the normal nasal cycle that occur. If this nostril is blocked for a long time, however, with other symptoms, then it should be evaluated.
Why is one side of my nose blocked but not the other?
It may be due to the nasal cycle, deviated septum, allergies, nasal polyps, inflammation or some other structural issue. An examination might be necessary to determine the cause.
What is the fastest way to clear the one sided congestion?
Use of saline nasal spray may relieve mild nasal congestion; avoiding known irritants may help to decrease symptoms. Treatment depends on the cause and is best. Unresolved obstruction should not be dealt with just by using decongestant sprays again and again.
Does a deviated septum lead to a blocked nose?
Yes. A deviated septum may cause one of the nasal passages to become blocked and breathing to be more difficult on the side of the nose with the deviation. Your ENT physician will determine if it is causing your symptoms.
When is one sided nasal blockage a problem to investigate?
Get a check if it is not gone within 10 minutes, if it keeps occurring on the same side, if there is any nosebleeding, any unusual discharge or loss of smell, swelling of the face or other worrisome symptoms.
