Chronic sinusitis is different from the short, miserable sinus infection many people get after a cold. It is not just a bad week or two of pressure and congestion. It is a longer-running condition in which the nose and sinuses stay inflamed for months, often affecting breathing, smell, sleep, concentration and overall quality of life.
Some people describe it as feeling permanently blocked. Others say they are constantly clearing their throat, sleeping badly, or living with a dull pressure in the face that never fully goes away. Many find that friends and family underestimate it because it sounds minor. In reality, chronic sinusitis can be draining, frustrating and surprisingly disruptive.
This guide explains what chronic sinusitis is, what it feels like in real life, what causes it, how it differs from ordinary sinusitis, what treatments actually help, when antibiotics are useful or not useful, and when it is time to think about ENT assessment or surgery.
If you are exploring nose and ENT problems more broadly, you may also want to read our Sinusitis guide, our ENT resources, and our article on NHS vs private healthcare in the UK.
What is chronic sinusitis?
Chronic sinusitis, often called chronic rhinosinusitis, means inflammation of the nose and sinuses that lasts for more than 12 weeks. The term “rhino” is important because the nose and sinuses usually behave as one system. In other words, this is rarely just a sinus problem in isolation. It is usually a long-term inflammatory problem affecting the nasal passages as well.
The condition may happen with nasal polyps or without nasal polyps. Polyps are soft, non-cancerous growths in the lining of the nose or sinuses. Some people with chronic sinusitis have them, some do not, and the pattern of symptoms can differ depending on which type you have.
A useful way to think about chronic sinusitis is this: short-term sinusitis is often a temporary flare after an infection, but chronic sinusitis is more like the system has become persistently swollen, irritated and poor at draining itself.
How is chronic sinusitis different from ordinary sinusitis?
Most people get confused here, and understandably so.
Acute sinusitis usually comes on over days, often after a cold, and often improves within 2 to 3 weeks.
Chronic sinusitis means symptoms keep going for more than 12 weeks. That does not always mean the symptoms are dramatic every single day. Some people have ups and downs. But the overall problem never fully clears.
This matters because the treatment approach changes. With acute sinusitis, the focus is usually short-term symptom relief. With chronic sinusitis, the focus is usually longer-term control of inflammation and improving drainage, often over months rather than days.
What chronic sinusitis feels like in real life
People often expect chronic sinusitis to mean severe facial pain all the time, but that is not always the main feature. For many, the condition is more about constant congestion, poor smell, mucus and a feeling of never being clear-headed.
Example 1: You have had a blocked nose for months. You wake with a dry mouth because you breathe through your mouth at night. You do not feel acutely ill, but you never feel clear either.
Example 2: Food does not taste the same anymore because your sense of smell has become weak. You only realise how much that matters when everyday pleasures start feeling flat.
Example 3: You keep being treated for “sinus infections”, but what you actually have is long-term inflammation that briefly flares, then settles back into a background level of blockage and drip.
Example 4: You have asthma or allergies and notice your nose is almost always inflamed. Every cold tips you into weeks of thick mucus, poor sleep and facial pressure.
Example 5: You say you get “sinus headaches”, but what you really mean is persistent pressure, forehead heaviness, post-nasal drip and brain fog rather than sharp pain.
Common symptoms of chronic sinusitis
The usual diagnostic pattern is at least two ongoing symptoms, and one of those is usually nasal blockage or nasal discharge.
Typical symptoms include:
- a persistently blocked or stuffy nose
- mucus from the nose or mucus draining down the back of the throat
- reduced or lost sense of smell
- facial pressure, fullness or discomfort
- recurrent flares that feel like repeated sinus infections
- poor sleep from nasal blockage
- mouth breathing, especially at night
- cough or throat clearing caused by post-nasal drip
- fatigue and difficulty concentrating
Not everyone has all of these. Some people mainly notice smell loss and blockage. Others are most troubled by drip, coughing or repeated flare-ups.
What causes chronic sinusitis?
There is not always one single cause. Chronic sinusitis is usually the result of several overlapping factors rather than one simple trigger.
Common contributing factors include ongoing inflammation inside the nose, allergies, asthma, nasal polyps, smoking, repeated infections, structural narrowing such as a deviated septum, and sometimes irritation from the environment. In some people, the lining of the nose and sinuses seems especially prone to swelling and poor drainage.
This is why chronic sinusitis often does not respond well to a “one-off fix”. The underlying issue is usually that the nose and sinus passages remain inflamed over time.
Chronic sinusitis with nasal polyps vs without polyps
This distinction matters because it can change both symptoms and treatment decisions.
With nasal polyps, people often have more blockage, more loss of smell and a heavier feeling of obstruction. Polyps can physically narrow the space inside the nose and make breathing feel permanently restricted.
Without nasal polyps, symptoms may still be very persistent, but the pattern may centre more on pressure, discharge, recurrent flares and difficulty clearing the sinuses.
Many people do not know whether polyps are present until a clinician looks inside the nose, sometimes with a small camera during ENT assessment.
Why smell loss matters more than people think
Reduced smell is one of the most important clues in chronic sinusitis. It is also one of the symptoms people sometimes under-report because they get used to it gradually.
But smell loss affects more than food enjoyment. It can affect appetite, safety, memory, mood and quality of life. People may stop noticing smoke, gas, spoiled food or changes in their environment. If your sense of smell has been reduced for months along with congestion and drip, that is a strong reason to get assessed properly.
Is chronic sinusitis an infection?
Sometimes people talk as if chronic sinusitis means a lingering infection that needs stronger and stronger antibiotics. That is usually too simplistic.
Chronic sinusitis is usually better understood as a long-term inflammatory condition. Some people do get episodes of secondary infection on top of it, and those flares may need specific treatment. But the background problem is often inflammation and poor drainage rather than a simple infection that never got wiped out.
That is one reason antibiotics are not routinely the answer for ongoing chronic symptoms.
When antibiotics may help, and when they may not
Antibiotics can be useful in selected cases, especially when there is evidence of a bacterial flare-up. But for many people with chronic sinusitis, repeated antibiotic courses do not solve the underlying problem.
This can be frustrating. Many people feel that because the mucus is thick or coloured, there must be infection. Sometimes there is. But not always. Chronic inflammation can also produce stubborn symptoms that look infectious from the outside.
If symptoms keep returning soon after antibiotic treatment, that is often a sign to step back and look at the bigger picture rather than simply repeating the same approach.
What actually helps chronic sinusitis
The most effective treatment is usually steady, consistent treatment over time, not an overnight cure.
Saline nasal rinses
These are one of the cornerstones of treatment. Saline rinses help wash out mucus, reduce crusting and improve the environment inside the nose. People often underestimate how much difference regular rinsing can make when done properly and consistently.
Used once or twice and abandoned, they often seem pointless. Used regularly for weeks, they can become one of the most useful parts of treatment.
Nasal steroid sprays or drops
These are another mainstay of treatment, especially in long-term inflammatory disease and in people with polyps. They reduce swelling rather than simply “opening the nose” for a few hours.
This is important: nasal steroids are not an instant fix. Many people stop too early because they expected a dramatic result in a day or two. In reality, the benefit often builds gradually with regular use.
Managing allergies where relevant
If allergies are contributing, that part of the picture needs attention too. Otherwise the nose may remain inflamed and the sinuses may never get a fair chance to settle.
Looking at the wider airway
Chronic sinusitis often overlaps with asthma and general upper-airway inflammation. In some people, improvement comes only when the wider pattern is understood rather than treating the nose in isolation.
Specialist medicines in selected cases
Some people need short courses of stronger treatment, and a smaller number with severe disease, especially severe chronic rhinosinusitis with nasal polyps, may eventually be considered for more advanced specialist options.
What people often get wrong
One of the biggest problems with chronic sinusitis is that people either under-treat it or chase short-term relief instead of a long-term plan.
A few common mistakes:
- using steroid sprays for a few days, then giving up
- expecting antibiotics to solve chronic inflammation
- using decongestant sprays too often and ending up more blocked
- assuming loss of smell is minor and not worth mentioning
- treating repeated flare-ups as unrelated when they are part of one chronic pattern
- smoking or continuing exposure to irritants without realising how much they worsen the condition
What to avoid
With chronic sinusitis, what you avoid matters almost as much as what you take.
Try to avoid smoking, overuse of short-term decongestant sprays, stopping long-term treatment too early, and assuming that because you have had symptoms for months nothing can be done. Many people improve significantly once the condition is recognised properly and treated consistently.
It is also worth being cautious with internet advice promising quick cures, miracle supplements or aggressive “sinus cleansing” methods. Chronic sinusitis is usually improved by evidence-based, regular treatment rather than extreme hacks.
When should you see a GP?
If symptoms have lasted more than 12 weeks, it is worth speaking to a GP. At that point, this is no longer just a standard short-term sinus infection.
You should also seek medical advice if you are repeatedly getting what seem like sinus infections, if your sense of smell has noticeably declined, if your sleep is poor because of nasal blockage, or if the condition is affecting work or daily life.
When should you see an ENT specialist?
ENT becomes more relevant when symptoms continue despite good medical treatment, when polyps are suspected, when the diagnosis is uncertain, when one-sided symptoms raise questions, or when surgery may need to be discussed.
In ENT clinic, assessment may include a small camera test called nasal endoscopy to look further inside the nose. This can reveal polyps, persistent inflammation, anatomical narrowing or other causes of blockage that are not obvious from the outside.
What scans or tests might be needed?
Many people with chronic sinusitis are diagnosed from their history and examination alone. But if symptoms are persistent, severe or heading towards surgery, further assessment may be needed.
This might include:
- an examination of the inside of the nose
- nasal endoscopy
- assessment for allergy or asthma links
- occasionally a CT scan of the sinuses
A CT scan is not usually the first step for everyone with a blocked nose, but it can be very useful when symptoms are longstanding or when an operation is being considered.
When surgery may be considered
Most people with chronic sinusitis do not need surgery. That is worth saying clearly. Medical treatment comes first and remains the mainstay for most people.
But surgery may be discussed if symptoms remain significant despite good, consistent treatment. This is especially relevant if the sinuses stay blocked, polyps are present, or the anatomy of the nose is making drainage difficult.
The most common operation is endoscopic sinus surgery. The aim is to widen the natural drainage pathways of the sinuses and remove obstructing inflamed tissue or polyps where needed. It is not a magic reset button, and it does not mean treatment ends afterwards. In fact, ongoing saline rinses and nasal steroid treatment are often still important after surgery.
A good way to think about surgery is that it can create a better environment for long-term control, but it usually works best as part of a bigger management plan rather than as a standalone cure.
Can chronic sinusitis come back after surgery?
Yes, it can. Surgery can help a great deal, but it does not guarantee the condition will never return. Chronic sinusitis is a long-term inflammatory condition, so even after a successful operation, many people still need ongoing nasal care and follow-up.
This does not mean surgery is not worthwhile. It simply means expectations should be realistic. The goal is usually major improvement and better control, not necessarily a permanent cure with no further treatment ever needed.
What about chronic sinusitis with asthma or allergies?
This combination is common. If you have asthma, hay fever, nasal symptoms and repeated sinus problems, it is often a sign that the whole airway is involved in an inflammatory pattern. Treating one part while ignoring the rest often gives incomplete results.
That is why some people do much better once the nose, sinuses, allergies and lower airway are looked at together rather than as separate issues.
Could it be something else?
Yes. Not every long-term “sinus” complaint is chronic sinusitis.
Chronic rhinitis, allergy, migraine, structural nasal blockage, dental issues and other conditions can overlap with or mimic sinus symptoms. That is especially worth considering if the main complaint is facial pain without much blockage or discharge, or if standard sinus treatment is not helping at all.
Questions people often ask
Can chronic sinusitis go away on its own?
Sometimes symptoms can improve, but if you have had ongoing symptoms for months, it is usually better to think in terms of management and control rather than simply waiting it out.
Is chronic sinusitis serious?
It is usually not dangerous, but it can have a major effect on quality of life and should not be dismissed if it is persistent.
Can chronic sinusitis cause bad breath?
Yes, ongoing mucus and post-nasal drip can contribute to bad breath in some people.
Can chronic sinusitis cause tiredness?
Yes. Poor sleep, mouth breathing, constant inflammation and the general burden of the condition can all leave people feeling run down.
Why do I keep clearing my throat?
Post-nasal drip from long-term sinus and nasal inflammation is a common reason.
Does everyone with chronic sinusitis need an ENT referral?
No. Many people can be managed well in primary care, but persistent or difficult cases may need specialist review.
Trusted UK resources
For further information, you can read the NHS guidance on sinusitis, ENT UK information on chronic rhinosinusitis without nasal polyps and chronic rhinosinusitis with nasal polyps.
Final word
Chronic sinusitis is easy for other people to underestimate because it rarely looks dramatic from the outside. But living with long-term nasal blockage, smell loss, drip, poor sleep and repeated flare-ups can be exhausting.
The good news is that there are real treatment options, and many people improve once they stop treating it like a short-term infection and start managing it as the long-term inflammatory condition it usually is.
If symptoms have been going on for more than 12 weeks, do not just keep hoping the next cold remedy or antibiotic will finally sort it out. Get it assessed, treat it properly, and think long term.
