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Dr. Chrysoula I. Liakou MD, PhD
- Treated online: Yes, usually. Video assessment, with a prescription when appropriate.
- Decongestant nasal sprays should not be used for more than about a week, because longer use causes rebound congestion.
- Congestion from a cold usually clears within about 10 days; anything longer suggests allergy, sinusitis or another cause.
- Steroid nasal sprays are the most effective treatment for allergic congestion, but their full effect builds over days to weeks.
- If a blocked nose comes with severe headache, a stiff neck, vision changes or swelling around an eye, call 112 or seek emergency care.
A blocked nose is rarely an emergency, but a few patterns need in-person care rather than a video call. See a doctor in person for a persistently one-sided blockage with bleeding or crusting, facial or eye swelling with a blocked nose, or clear watery fluid dripping from the nose after a head injury. A baby who is so congested that feeding or breathing is difficult also needs prompt assessment. If a blocked nose comes with severe headache, a stiff neck, vision changes or swelling around an eye, call 112 or seek emergency care.
Can an online doctor treat nasal congestion?
Yes. Nasal congestion is a symptom rather than a diagnosis, so a video consultation focuses on why the nose is blocked: a licensed doctor takes a history, looks at the pattern of symptoms, and can prescribe a steroid nasal spray or antihistamine where the cause is allergy or inflammation. Congestion is very treatable online, and the doctor tells you when a blockage needs in-person examination instead.
Most congestion comes down to a handful of causes that a good history distinguishes well: an ordinary cold, allergy, sinus inflammation, or long-term rhinitis. Because the diagnosis rests on the story rather than a physical examination, video assessment suits it, and it lets the doctor prescribe the right treatment, which for a stubborn blocked nose is often a prescription-strength spray rather than another over-the-counter product.
How an online consultation helps with nasal congestion
- Allergy or infection, sorted: the doctor works out whether your blocked nose is allergic, viral or from sinus inflammation, because the three are treated in completely different ways and guessing wastes weeks.
- Prescriptions after a consultation: where the cause calls for it, the doctor can prescribe a steroid nasal spray or a non-sedating antihistamine and send it to a pharmacy near you in most EU countries, going beyond what the pharmacy shelf offers.
- The decongestant-rebound trap explained: if a spray has stopped working or made things worse, the doctor recognises rebound congestion and sets out a clear plan to break the cycle.
- A safety net for the rare serious causes: you leave knowing which features (one-sided blockage with bleeding, facial or eye swelling) mean an in-person look rather than another spray.
What causes a blocked nose?
Congestion happens when the lining of the nose swells and produces mucus, narrowing the airway. The common causes are:
- Colds and viral infections: the most frequent cause, usually settling within about 10 days as the infection clears.[2][4]
- Allergic rhinitis: an allergic reaction to pollen, dust mites, pets or mould, driving congestion along with sneezing, itch and a clear runny nose.[1]
- Sinusitis: inflammation of the sinuses, adding facial pain or pressure and often thicker, discoloured discharge, especially when congestion drags past 10 days.[3]
- Non-allergic rhinitis: a nose that reacts to temperature changes, strong smells, alcohol or hormonal shifts without a true allergy.
- Rebound congestion: from overusing decongestant nasal sprays, covered in detail below.
- Structural causes: a deviated septum, nasal polyps or enlarged adenoids in children, which tend to cause a more constant or one-sided blockage.
Is my blocked nose an allergy or an infection?
Allergy and infection are the two causes people most often confuse, and telling them apart changes the treatment entirely. Allergic congestion tends to come with sneezing, an itchy nose, eyes or throat, and a clear watery discharge; it often follows a pattern, worse outdoors in pollen season, or worse in a dusty or pet-filled room, and it can persist for weeks or return every year. Infective congestion from a cold usually arrives with a sore throat or cough, may bring a mild fever, produces mucus that can thicken and change colour, and follows the rise-and-fall course of an illness that clears within a week or two.[1][2]
The overlap is real, which is why a history matters. Itch and sneezing point towards allergy; a defined illness with other cold symptoms points towards infection; and congestion that has outstayed a cold, or that flares predictably with exposure, is where an assessment earns its keep. If the picture is allergic, a persistent problem such as hay fever and other allergic rhinitis is treated very differently from a passing cold, usually with a steroid nasal spray rather than a decongestant.
Decongestant sprays and rebound congestion
This is the single most important thing to understand about treating a blocked nose. Decongestant nasal sprays (containing xylometazoline or oxymetazoline) work quickly and can feel like a miracle, but they must not be used for more than about five to seven days in a row.[1][5] Used for longer, they cause rebound congestion, known medically as rhinitis medicamentosa: the nose becomes dependent on the spray, blocks up worse than before as each dose wears off, and drives you to spray more often, in a loop that can run for months. It is a common and genuinely frustrating problem, and the treatment is not a stronger decongestant.
Breaking the cycle means stopping the decongestant spray, which is uncomfortable for a week or two while the nose recovers, often with a steroid nasal spray started to calm the lining and ease the transition. A doctor can plan this with you, explain what to expect, and prescribe the steroid spray where appropriate. The lasting lesson is to treat ongoing congestion with a steroid spray, saline or antihistamine rather than reaching repeatedly for a fast-acting decongestant.
How doctors decide the cause and the treatment
Whether a blocked nose needs self-care, a prescription or an in-person look depends on the likely cause and how long it has lasted. The table below shows how doctors sort it.
Swipe sideways to compare →
| Congestion presentation | Likely first step | Suitable for online care? | When referral or in-person care is needed |
|---|---|---|---|
| Blocked nose with a cold, under 10 days, other cold symptoms | Saline, short-term decongestant, and a safety net | Usually yes | If it lasts beyond 10 days or clearly worsens |
| Sneezing, itch and clear discharge, seasonal or exposure-linked | Steroid nasal spray or antihistamine for allergic rhinitis[1] | Yes | Poor response, or asthma that needs review alongside |
| Congestion over 10 days with facial pain or discoloured discharge | Assess for sinusitis and treat accordingly | Yes, for assessment | Eye or facial swelling, vision change, or severe headache |
| Worsening congestion after prolonged decongestant spray use | Stop the spray; steroid nasal spray to break rebound | Yes | Congestion that persists after stopping the spray |
| Persistent one-sided blockage with bleeding, or facial or eye swelling | Prompt in-person examination | No | In person, and 112 for eye swelling or vision change |
Availability of individual medicines and who may prescribe them vary by country; your doctor confirms what applies where you are.
Not sure which row is you? A doctor can tell you in one consultation.
See available times →What the doctor checks in an online nasal congestion consultation
The assessment is a structured history aimed at pinning down the cause. In a congestion consultation the doctor will typically check:
- How long it has lasted: days, weeks or months, and whether it is constant or comes and goes.
- The company it keeps: sneezing and itch (suggesting allergy), fever and sore throat (suggesting a cold), or facial pain and discoloured mucus (suggesting sinusitis).
- One side or both: a persistently one-sided blockage is treated more cautiously and may need examination.
- Triggers and timing: pollen seasons, pets, dust, workplace exposures, or a nose that reacts to cold air, smells or alcohol.
- What you have already used: especially decongestant sprays, and for how long, to spot rebound congestion.
- Your background: asthma, eczema or hay fever, previous nasal surgery, and any recent head injury.
- The effect on you: sleep, and whether you have lost your sense of smell, which points towards polyps or significant inflammation.
Treatment options for nasal congestion
What you can do yourself
Saline sprays or rinses are safe, effective and can be used as often as you like to loosen mucus and settle the lining; they are a genuinely useful first step for almost any blocked nose. Steam inhalation can feel soothing for a short while, though the evidence that it changes the course of congestion is limited, so treat it as comfort rather than cure and take care to avoid scalds. Keeping hydrated, airing rooms, and reducing exposure to a known allergen all help. A short course of a decongestant spray is fine for a few days during a cold, provided you respect the five-to-seven-day limit.[5]
Prescription treatment after your consultation
A prescription is never issued without a consultation. Where the cause is allergic rhinitis or persistent inflammation, the mainstay is a steroid nasal spray, which works best used regularly over days to weeks rather than expecting instant relief, and the doctor can prescribe one and show you how to use it correctly.[1] A non-sedating antihistamine helps allergic congestion with sneezing and itch. If sinusitis is the cause, treatment follows that pathway, and antibiotics are only prescribed where a bacterial infection is genuinely suspected, not for ordinary viral congestion. Which products are available and who may prescribe them varies by country, and your doctor confirms what applies where you are.
When we treat nasal congestion online, and when we refer you
We treat online: congestion from colds needing self-care and a safety net; allergic rhinitis that benefits from a steroid nasal spray or antihistamine; rebound congestion from decongestant overuse, where the plan is to stop the spray and settle the lining; and congestion crossing into sinusitis that can be assessed and treated.
We refer or redirect you: a persistently one-sided blockage with bleeding or crusting, which needs an in-person nasal examination; suspected nasal polyps or a structural problem for which an ear, nose and throat opinion helps; facial or eye swelling, vision changes or severe headache, which are urgent; and clear fluid from the nose after a head injury. In those cases the consultation directs you to the right care. A blocked nose is one of the most common cold and flu symptoms our doctors assess online, and it often travels with the common cold.
When to get in-person care
See a doctor in person for a blocked nose that is persistently one-sided with bleeding or crusting, a lost sense of smell that does not return, or congestion that never fully clears despite treatment. Get urgent care, and call 112, if a blocked nose comes with swelling around an eye, changes in vision, a severe headache with a stiff neck, or clear watery fluid leaking from the nose after a head injury. These are uncommon, but they need assessment that a video call cannot provide.
Treating a blocked nose at home: what helps and what does not
Home care handles most blocked noses: saline rinses or sprays, steam if it comforts you, staying hydrated, sleeping slightly propped up, and short pharmacy decongestant courses used only as the pack directs, because overusing them causes rebound blockage.
What home care cannot do: it cannot explain a blockage that stays. Congestion beyond three weeks, blockage affecting one side only, repeated nosebleeds from the same side, facial pain or a smell disturbance that persists all deserve a doctor’s look, because chronic sinusitis, polyps and other structural causes need more than steam.
You do not have to leave home for that step either: a video consultation is at-home care with a licensed doctor in it, usually within about 15 minutes, and if treatment is right for you the prescription follows to a pharmacy near you. Book a video consultation: no subscription, exact price before payment.
How Mobi Doctor works
- Book a time that suits you: open daily 7am–11pm. Most patients speak to a doctor within about 15 minutes of their booked time. no subscription, exact price up front.
- Speak to a licensed doctor about nasal congestion: a private video call: you describe what you feel, the doctor asks what matters, and you agree the right plan together.
- Leave with your plan: everything agreed before you hang up: any prescription reaches a pharmacy near you in most EU countries, or a full refund.
No sign-up needed
Tick what you feel to see every condition page that mentions it. It finds the right page, not a diagnosis: a doctor gives you that on a video call.
Similar symptoms, different condition? Hay Fever can start the same way. Compare them, or find your symptom in the symptom navigator.
Frequently asked questions about nasal congestion
Can an online doctor prescribe treatment for nasal congestion in Europe?
Yes, after a consultation. Where the cause is allergic rhinitis or persistent inflammation, the doctor can prescribe a steroid nasal spray or a non-sedating antihistamine and send it to a pharmacy near you in most EU countries. Ordinary viral congestion needs saline and time rather than a prescription, and prescribing rules vary by country.
How much does an online nasal congestion consultation cost?
The exact price of a video consultation is shown before payment, and there is no subscription. Appointments run 7 days a week from 7am to 11pm, often within about 15 minutes, with a licensed doctor by video from anywhere in Europe.
Why is my nose more blocked after using a decongestant spray?
This is rebound congestion, or rhinitis medicamentosa. Decongestant sprays used for more than about a week make the nose block up worse as each dose wears off, so you use more, in a self-feeding cycle. The fix is to stop the spray, often with a steroid nasal spray to settle the lining, which a doctor can plan with you.
Is my blocked nose an allergy or an infection?
Allergy tends to come with sneezing, an itchy nose or eyes, and clear discharge, and often follows pollen seasons or exposure to dust or pets. A cold usually brings a sore throat or mild fever and clears within a week or two. Congestion that outstays a cold, or flares with exposure, is worth assessing to get the treatment right.
How long should a blocked nose last?
Congestion from a cold usually eases within about 10 days. A blocked nose lasting longer suggests something other than a passing infection, such as allergic rhinitis, sinusitis or rebound congestion from spray overuse. Persistent congestion is worth a consultation, because each of these has its own treatment.
Do steroid nasal sprays actually work for congestion?
Yes, for allergic and inflammatory congestion they are the most effective treatment, but they work gradually. Used correctly and regularly, they reach their full effect over days to a couple of weeks rather than instantly, so they reward patience. The doctor can prescribe one and explain the technique that makes them work.
When should I worry about a blocked nose?
Most congestion is harmless. See a doctor in person for a persistently one-sided blockage with bleeding, a lost sense of smell, or congestion that never clears. Seek urgent care for swelling around an eye, vision changes, a severe headache with a stiff neck, or clear fluid from the nose after a head injury.
- Allergic rhinitis, NICE CKS, Clinical Knowledge Summaries, reviewed 2024.
- Common cold, NICE CKS, Clinical Knowledge Summaries, reviewed 2024.
- Sinusitis, NICE CKS, Clinical Knowledge Summaries, reviewed 2024.
- Common cold, HSE, Health Service Executive (Ireland), accessed August 2026.
- Nasal decongestants in monotherapy for the common cold, Cochrane, Cochrane Collaboration, 2016.
This page is for information only and is not a substitute for a medical consultation. Guideline links are provided for transparency; treatment decisions are made with your doctor.
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