Nose

Blocked or stuffy nose

A stuffy, congested or blocked nose where the lining is swollen and the airways feel obstructed — usually caused by a cold, an allergy or sinus inflammation, but occasionally a sign of a structural problem or, when one-sided and bloody, something that needs checking.

Education and reference only. This explains the common causes of blocked or stuffy nose and the warning signs that need urgent help, in plain language — it is not a diagnosis or a substitute for advice from a clinician. If you feel very unwell or are worried, seek medical help.

Written by Meds Global Health Clinical Team · Clinically reviewed by Dr Muhammad Suffyan, MB BS, Founder & Clinical Director · Last reviewed · How we review

Quick answer

What is blocked or stuffy nose?

A blocked nose happens when the soft lining inside the nose becomes swollen and inflamed, narrowing the air passages so that breathing through the nose feels difficult. Far more often than not it is harmless and short-lived: viral colds, flu and other respiratory infections swell the lining for a few days, while allergic reactions to pollen, dust mites or pets cause a recurring, often seasonal congestion with sneezing and an itchy, runny nose.

  • Get urgent help: See your doctor without delay for a nose that stays blocked on one side only, especially with bloody or blood-stained discharge — this needs checking. Seek urgent help if a blocked nose comes with a severe headache, a stiff neck, a high fever and dislike of light — this can signal a serious infection.
  • Self-care: A blocked nose from a cold or allergy usually eases with simple, dose-free measures: keep well hydrated, breathe in warm, moist air from a bowl of hot water or a steamy shower, and prop yourself up on an extra pillow at night so the lining drains more easily.

About blocked or stuffy nose

A blocked nose happens when the soft lining inside the nose becomes swollen and inflamed, narrowing the air passages so that breathing through the nose feels difficult. Far more often than not it is harmless and short-lived: viral colds, flu and other respiratory infections swell the lining for a few days, while allergic reactions to pollen, dust mites or pets cause a recurring, often seasonal congestion with sneezing and an itchy, runny nose. Longer-lasting blockage can come from inflamed sinuses, nasal polyps or a deviated septum. The character matters: congestion that switches from side to side and comes with other cold or allergy symptoms is reassuring, whereas a nose that is persistently blocked on one side only — particularly with blood-stained discharge — deserves a proper look. Most blocked noses clear on their own with time and simple measures.

When to get help

Call 999 now if…

Call 999 or go to A&E if blocked or stuffy nose comes with any of these warning signs:

  • See your doctor without delay for a nose that stays blocked on one side only, especially with bloody or blood-stained discharge — this needs checking.
  • Seek urgent help if a blocked nose comes with a severe headache, a stiff neck, a high fever and dislike of light — this can signal a serious infection.
  • Seek same-day advice if facial swelling, redness or pain develops around the eye or cheek with a blocked nose, as the infection may be spreading.
  • See your doctor if a blocked nose lasts more than a few weeks, keeps coming back, or is steadily reducing your sense of smell.
  • Get urgent help for any blocked nose with breathing difficulty, facial or lip swelling after contact with an allergen — this may be a serious reaction.

When to see a doctor

Most blocked noses settle within a week or two and need nothing more than self-care. Book a routine appointment if congestion lasts longer than three weeks, keeps returning, is affecting your sleep or sense of smell, or seems linked to a particular season or trigger so allergy can be confirmed. See your doctor sooner — and specifically — for a nose blocked persistently on one side only, particularly if there is any blood in the discharge, as a one-sided problem deserves direct examination. Seek urgent help if congestion comes with a severe headache, neck stiffness, high fever or spreading facial swelling.

999Emergency — call 999 or go to A&E
111Urgent advice — call NHS 111 or use 111 online
GPNon-urgent — see your GP or pharmacist

Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.

What can cause it

Common causes of blocked or stuffy nose

Blocked or stuffy nose has many possible causes. Each links to a full, plain-language guide to that condition — what it is, how it's treated and when to seek help.

Hay fever & allergic rhinitis Allergy and immunology An allergic reaction to pollen, dust or pets swells the lining, causing a blocked, itchy, runny nose with sneezing. Sinusitis Ear, nose and throat Inflamed sinuses cause a blocked nose with facial pressure, a reduced sense of smell and thick discharge. COVID-19 Infections A coronavirus infection can cause a blocked or runny nose along with cough, sore throat and sometimes loss of smell. Influenza Respiratory Flu often brings nasal congestion alongside fever, body aches, tiredness and a cough. Acute bronchitis Respiratory A viral upper-airway infection that can leave the nose stuffy and runny as part of a wider cold-like illness.

What helps

Self-care and what you can do

A blocked nose from a cold or allergy usually eases with simple, dose-free measures: keep well hydrated, breathe in warm, moist air from a bowl of hot water or a steamy shower, and prop yourself up on an extra pillow at night so the lining drains more easily. Saline rinses or sprays gently flush and soothe the nose and are safe to use regularly. If allergy is the trigger, reducing exposure helps — keep windows shut on high-pollen days, wash bedding often, and damp-dust to limit dust mites. Avoid smoky or very dry environments, which irritate the lining further. If congestion keeps returning or is clearly tied to a season, a pharmacist can advise on allergy management.

Answers

Blocked or stuffy nose: frequently asked questions

Why is my nose blocked on only one side?

A nose that swaps sides through the day is normal and usually harmless. But a nose that stays blocked on the same side for weeks, especially with blood-stained discharge, should be examined by a doctor rather than assumed to be a simple cold.

How long should a blocked nose last?

A blocked nose from a cold usually clears within a week or two. Congestion that persists beyond three weeks, keeps returning, or is reducing your sense of smell is worth a routine appointment to find the cause.

Is a blocked nose ever an emergency?

Rarely. Most congestion is harmless. Treat it as urgent if it comes with a severe headache and stiff neck, a high fever and dislike of light, spreading facial swelling around the eye, or any breathing difficulty and swelling after an allergen.

Can allergies cause a permanently blocked nose?

Yes. Allergic rhinitis to dust mites or pets can keep the nose congested all year, while pollen allergy causes a seasonal pattern. Reducing exposure and seeking allergy advice often helps, so a recurring blocked nose is worth discussing with a pharmacist or doctor.

Sources

Where this is drawn from

  • NICE CKS: Allergic rhinitis.
  • Allergy UK: nasal congestion.

Related symptoms

Frequent sneezingRepeated, sudden bursts of sneezing as the nose tries to clear an irritant — most often fr…Loss of smellA reduced or absent sense of smell — often dulling the sense of taste as well — which is m…Sore throatPain, scratchiness or rawness at the back of the throat that is usually caused by a passin…CoughA reflex to clear the airways that is usually caused by a viral infection and settles with…

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