Nasal Congestion: Causes, Treatments, and When To Seek Help

What causes nasal congestion?

Nasal congestion, often referred to as a blocked or stuffy nose, is a common issue that most people experience at some point. While it’s rarely a sign of something serious, it can be uncomfortable and inconvenient.

In most cases, nasal congestion is caused by a short-term illness, such as a cold, and will clear up on its own within a couple of weeks. Other frequent causes include allergies, particularly hay fever.

Nasal congestion occurs when the tissues and blood vessels in and around the nose become swollen and inflamed.

This swelling is often the result of:

  • Infection - Such as a cold or the flu

  • Allergens- Like pollen 

  • Irritants - Such as smoke or strong odours

Young man pinching the bridge of his nose against a blue background, appearing to have a headache

Understanding nasal congestion

In response to these triggers, your immune system produces extra mucus (catarrh) to flush out the irritants or infection. This can lead to a runny nose or post-nasal drip.

If your sinuses (the air-filled spaces behind your cheeks and forehead) become inflamed, you may also experience a build-up of mucus. This can cause sinus pain, which feels like pressure or tenderness around the cheeks, eyes, or forehead.

While nasal congestion is typically short-lived, it can become chronic in some cases, requiring medical attention from a doctor or an Advanced Clinical Practitioner.

 

What conditions can cause nasal congestion?

The most common cause of nasal congestion is a cold or the flu. These infections inflame the nasal passages, triggering an increase in mucus production and causing your nose to feel blocked or runny. If the infection spreads to the sinuses, it may result in sinus pain and pressure.

Woman pinching the bridge of her nose with eyes closed, appearing to have a headache

 Possible Causes

Detail

Allergies 

Exposure to triggers like pollen, dust mites, or pet dander can lead to congestion. 

Environmental irritants 

Smoke, fumes, or even extreme weather conditions can cause a stuffy nose. 

Anatomical abnormalities 

Conditions such as nasal polyps (painless growths in the nose) or a deviated septum (a crooked nasal partition) can lead to chronic congestion. 

Hormonal changes 

Pregnancy or hormonal imbalances can sometimes cause nasal congestion. 

Certain medications 

Some medicines, including beta-blockers, may cause nasal congestion as a side effect. 

Overuse of decongestant sprays 

Prolonged use of nasal sprays can worsen congestion over time. 

How can I treat my nasal congestion at home?

If your nasal congestion is recent and not severe, you can manage your symptoms at home with simple remedies and non-prescription products from your pharmacy. Many people look specifically for a nasal congestion treatment, nasal congestion medication, or nasal congestion medicine, while others prefer to start with natural remedies nasal congestion — such as steam inhalation or saline rinses — before trying other nasal congestion remedies.

Here are some tips to ease a blocked nose:

 Tip

How

Stay hydrated 

Drink plenty of fluids to keep your nasal passages moist. 

Inhale steam 

Place your face over a bowl of hot water and breathe in the steam. 

Use a saltwater solution 

Saline sprays or rinses can help clear your nasal passages. 

Apply a warm compress 

Place a warm flannel over your nose and cheeks to reduce discomfort. 

Allergy relief & when to seek help

You can also use decongestants to relieve pressure and swelling in the nasal passages. However, it’s important to follow the instructions carefully and avoid using them for longer than recommended, as overuse can worsen your symptoms.

If your nasal congestion is allergy-related, antihistamines can help. For best results, try a combination antihistamine and decongestant. If you need something to use straightaway, a nasal congestion spray — ideally the best nasal spray for congestion for your particular symptoms — can offer fast congestion nasal relief, though it's best used short-term. Speak to your pharmacist if you want to relieve nasal congestion more regularly, as they can recommend the right nasal congestion relief for you.

 

When should I speak to a GP or Advanced Clinical Practitioner (ACP)?

You should speak to a healthcare professional if your nasal congestion:

  • Doesn’t go away after a couple of weeks.
  • Affects your quality of life or ability to sleep.
  • Is accompanied by persistent sinus pain, headaches, or facial swelling.

Your doctor may recommend tests to identify the cause of your congestion. These could include allergy testing or checks for nasal polyps, a deviated septum, or sinus issues.

If your symptoms are linked to your working environment, such as exposure to allergens or irritants, you may be at risk of occupational asthma. This condition requires tailored advice on managing triggers and using the appropriate treatment.

Frequently asked questions

Here are direct answers to some of the most frequently asked questions about nasal congestion.

Nasal congestion happens when the mucosa lining your nasal airway becomes swollen, a process doctors call mucosal oedema. Triggers can inflame the tissue around your turbinate (the ridged structures inside each nostril), which can obstruct or congest the space air normally flows through. It can affect one nostril (unilateral) or both (bilateral), and the blood vessels in the area can also dilate or vasodilatate, which is part of why the tissue swells.

Rhinitis simply means inflammation of the nose, and it comes in several forms. Allergic rhinitis is triggered by an allergen such as pollen or dust; non-allergic rhinitis (sometimes called vasomotor rhinitis) is not allergy-driven and can be linked to irritants, weather, or hormones; and occupational rhinitis develops from repeated exposure to substances at work. If the inflammation spreads to the sinuses as well, it is called rhinosinusitis, which can cause additional pressure and pain around the face.

Yes. A nasal polyp is a soft growth that can physically obstruct airflow, while a deviated septum is a structural difference in the wall between the nostrils that can make one side chronically blocked. Both tend to cause chronic rather than acute nasal inflammation, and unlike seasonal or perennial allergic causes linked to infectious triggers like a cold, they usually don’t resolve on their own — a doctor may need to assess whether an intranasal treatment, or in some cases minor surgery, is appropriate.

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