You don’t have a cold. You haven’t had a cold for months. And yet your nose is blocked. Every morning, every evening, sometimes all day. You’re starting to think this is just how you are now.
It isn’t. A constantly blocked nose almost always has an identifiable cause — and most of those causes have something you can actually do about them.
Here are the seven most common reasons for permanent nasal congestion, what each one feels like, and what helps.
1. Allergic rhinitis (year-round)
Most people associate hay fever with summer pollen. But indoor allergens — dust mites, pet dander, mould spores — cause the same reaction year-round. If your nose is worse in your bedroom or after cuddling the cat, this could be it.
What helps: Allergen avoidance (mattress covers, regular cleaning), antihistamines, saline rinse, identifying your specific triggers via a GP allergy test.
2. Non-allergic rhinitis
Your nose can swell and produce mucus without any allergic trigger at all. Cold air, perfume, smoke, weather changes, even spicy food can set it off. There’s no IgE response, so antihistamines don’t help much. Read more about non-allergic rhinitis.
What helps: Trigger avoidance, saline rinse, anti-inflammatory approaches.
3. Rebound congestion (rhinitis medicamentosa)
If you’ve been using a pharmacy nasal spray (Otrivine, Sudafed, Afrin) for more than a week or two, your nose may now be blocked because of the spray, not despite it. Your nasal lining adapts to the decongestant and overcorrects when you stop using it.
This trap catches more people than you’d think. The frustrating part: the only way out is to stop using the spray, and the first few weeks are uncomfortable.
What helps: Read about rebound congestion and how to escape it.
4. Chronic rhinosinusitis (CRS)
Roughly 1 in 10 UK adults live with CRS — chronic inflammation of the sinuses lasting 12 weeks or more. Symptoms: persistent blockage, facial pressure, reduced sense of smell, post-nasal drip. It often gets misdiagnosed as recurring colds.
What helps: Proper GP diagnosis, saline rinses, steroid sprays, sometimes antibiotics or surgery for severe cases. Chronic CRS sufferers often look for non-conventional approaches when standard treatment plateaus.
5. Nasal polyps
Soft, painless growths in the lining of your nasal passages. Common in people with chronic sinusitis, asthma, or aspirin sensitivity. They block airflow physically, so you’ll often notice they don’t respond to decongestants.
What helps: GP referral. Steroid sprays can shrink them; surgical removal is sometimes needed. Polyps tend to come back, so long-term management is important.
6. Deviated septum
The wall between your two nostrils may be off-centre, narrowing one side. Many people are born with this; it can also result from injury. If your blockage is mostly on one side, this could be a factor.
What helps: Mild cases respond to the same approaches as other congestion. Severe cases may need a surgical correction (septoplasty).
7. Environmental and lifestyle triggers
Dry indoor air, central heating, smoking, vaping, air pollution, alcohol, even certain medications (some blood pressure drugs, antidepressants, hormonal contraceptives) can cause persistent congestion. These causes are often overlooked because they don’t show up on tests — but eliminating them can transform how you feel.
What helps: Humidifier, quitting or reducing smoking and vaping, reviewing medications with your GP.
What to do if nothing works
Many people reach this point: they’ve tried antihistamines, steroid sprays, decongestants, saline rinses, allergy testing, and possibly even surgery. And their nose is still blocked.
If that’s you, three things are worth knowing:
- It’s not just you. CRS affects millions of UK adults. You’re not failing — you’re stuck in a category where standard treatments don’t fully resolve the problem.
- Combinations work better than single treatments. Saline rinse + humidifier + trigger avoidance + an anti-inflammatory approach almost always beats any one of those on its own.
- There are non-conventional options. Capsaicin-based nasal sprays use a different mechanism — desensitising the inflamed nasal lining over time. They’re not a quick fix, but for chronic sufferers who’ve exhausted standard treatments, they’re worth knowing about.
When to see your GP
Book an appointment if your blocked nose has lasted more than 10 days, or if you have any of:
- Facial pain or pressure
- Loss of smell
- Coloured or bloody discharge
- Recurring sinus infections
- One-sided blockage (which can point to polyps or a structural issue)
You don’t need to live like this. There’s almost always a cause, and almost always something that helps.