Chronic Sinusitis

Introduction

If you have been told you have chronic sinusitis, you have probably already lived with the symptoms for a long time — a blocked nose that never quite clears, pressure across your face, a reduced sense of smell, post-nasal drip, or repeated rounds of antibiotics that help only briefly. Chronic sinusitis is not just a long cold. It is a persistent inflammation of the lining of the nose and sinuses, and it usually needs a structured plan rather than one-off treatments.

This article is written for adults and parents who already have a diagnosis of chronic sinusitis and are now planning the next phase of care. It covers what chronic sinusitis is, the different types doctors recognise, how it is diagnosed, the steps of medical treatment, when surgery is considered, what recovery looks like, and how to manage the condition over the long term. The aim is to help you understand the landscape of options so the conversations with your ENT (ear, nose and throat) specialist make more sense.

What Is Chronic Sinusitis?

Doctors use the term chronic rhinosinusitis (CRS) when symptoms last twelve weeks or longer despite treatment attempts. “Rhino” refers to the nose and “sinusitis” to the sinuses; in practice both areas are affected together, which is why most current guidelines, including the European Position Paper on Rhinosinusitis and Nasal Polyps (EPOS) and the American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS), prefer the term chronic rhinosinusitis. Throughout this article, “chronic sinusitis” is used as the more familiar term.

To meet the diagnostic criteria, an adult typically has two or more of the following symptoms for at least twelve weeks:

• Nasal blockage or congestion
• Nasal discharge, either from the front of the nose or as post-nasal drip down the throat
• Facial pain or pressure
• Reduced or lost sense of smell

At least one of these should be nasal blockage or nasal discharge. The diagnosis is confirmed when an ENT specialist sees signs of inflammation on nasal endoscopy (a thin camera passed into the nose) or on a CT scan of the sinuses.

Types of Chronic Sinusitis

Chronic sinusitis is not a single condition. Treatment depends heavily on which type a person has, so it is worth understanding the main groups.

Chronic Sinusitis Without Nasal Polyps (CRSsNP)

This is the more common form. The lining of the sinuses is inflamed but there are no soft grape-like growths inside the nose. Symptoms tend to be dominated by facial pressure, blockage, and discharge. The inflammation pattern is often a mix of immune cell types, and treatment typically focuses on saline rinses, steroid sprays, and treating any infection or contributing factor.

Chronic Sinusitis With Nasal Polyps (CRSwNP)

Polyps are soft, pale swellings of the nasal lining that develop when inflammation is intense and long-standing. They can block the nose almost completely. People with this type often report a marked loss of smell as one of the first and most distressing symptoms. CRSwNP is frequently driven by a particular pattern of inflammation called type 2 inflammation, which is also seen in asthma and certain allergies. This is the form most likely to need stronger anti-inflammatory treatment, including biologic medicines, and is more likely to come back after surgery.

Allergic Fungal Rhinosinusitis (AFRS)

In this form, an allergic-type reaction to fungi growing in the mucus produces very thick, peanut-butter-like secretions and polyps. It is particularly common in warm, humid climates. CT scans often show dense material inside expanded sinuses. Treatment usually combines surgery to clear the material and ongoing anti-inflammatory therapy.

Acute Exacerbations of Chronic Sinusitis

People with chronic sinusitis may have flare-ups where symptoms worsen suddenly, often with thicker, coloured discharge and increased facial pain. These episodes are sometimes triggered by viral infections and may need a short course of antibiotics in addition to the usual maintenance treatment.

Causes and Risk Factors

Chronic sinusitis is rarely caused by a single thing. In most people, several factors combine to keep inflammation going.

• Type 2 inflammation: The same immune pathway involved in asthma and allergic rhinitis drives many cases, especially those with polyps.
• Allergies: Allergic rhinitis to dust mites, pollens, animal dander, or moulds can keep the nasal lining inflamed.
• Asthma: Many people with chronic sinusitis also have asthma; the two conditions share inflammatory mechanisms.
• Aspirin-exacerbated respiratory disease (AERD): A pattern in which polyps, asthma, and sensitivity to aspirin and similar painkillers occur together.
• Anatomy of the nose: A deviated septum, narrow drainage channels, or large nasal turbinates can predispose to blockage and recurrent infection.
• Previous infections: Repeated viral or bacterial infections can damage the lining and impair its ability to clear mucus.
• Smoking and air pollution: Both irritate the nasal lining and impair mucus clearance.
• Immune deficiency: Less commonly, problems with the immune system make a person more prone to persistent sinus infection.
• Cystic fibrosis and primary ciliary dyskinesia: Inherited conditions in which the cilia (tiny hairs lining the sinuses) do not move mucus normally.
• Dental infections: Infections of the upper teeth can occasionally spread into the maxillary sinus.

Understanding which factors apply to you matters because controlling them — for example, treating allergies or asthma — is often the difference between a good response to sinus treatment and a frustrating cycle of relapse.

Signs and Symptoms to Recognise During Treatment

Since you already have the diagnosis, this section is less about identifying chronic sinusitis for the first time and more about understanding what to watch for during treatment and what counts as a flare-up.

The four core symptoms remain blockage, discharge, facial pressure, and reduced smell. In addition, many people experience:

• Headache, particularly around the forehead, cheeks, or between the eyes
• Cough, often worse at night due to post-nasal drip
• Ear fullness or pressure
• Bad breath
• Tiredness and reduced concentration
• Worsening of asthma symptoms

Certain symptoms suggest a more serious problem and need urgent medical review:

• Swelling, redness, or pain around the eye
• Vision changes, double vision, or eye movement problems
• Severe headache with fever or neck stiffness
• Confusion or altered consciousness
• A persistent bulge or change in the shape of the face

These can indicate that infection has spread beyond the sinuses and require immediate assessment.

Diagnosis

If you are already in care, you have likely been through some of these steps. Understanding why each is done helps make sense of the management plan.

Clinical Assessment

The ENT specialist will ask about the pattern, duration, and severity of symptoms, previous treatments, allergies, asthma, smoking, and any reactions to painkillers. They will examine the nose, ears, throat, and face.

Nasal Endoscopy

A thin flexible or rigid camera is passed into the nose, usually after a local anaesthetic spray. It allows the doctor to see the deeper parts of the nose and the sinus drainage areas, look for polyps, check for pus or discharge, and assess the response to treatment over time. Endoscopy is central to confirming the diagnosis and choosing the next step.

CT Scan of the Sinuses

A CT scan shows the bone and air spaces of the sinuses in detail. It is used to confirm chronic inflammation, map the anatomy before any surgery, and rule out other causes. CT is usually done after a course of medical treatment so the scan reflects the underlying problem rather than a temporary infection.

Allergy Testing

Skin prick tests or blood tests for specific allergens help identify environmental triggers, which can then be addressed with allergen avoidance and medications.

Other Tests

Depending on the picture, doctors may order:

• Blood tests for immune function or inflammatory markers
• Smell testing
• Cultures from nasal secretions, particularly if previous treatments have not worked
• Biopsy of polyps or unusual tissue
• Tests for cystic fibrosis or ciliary problems in selected cases

Treatment and Management

Treatment for chronic sinusitis is usually stepped. Most current guidelines, including EPOS and AAO-HNS, describe a sequence that starts with conservative measures and moves to more intensive therapy if symptoms continue. The exact plan depends on whether polyps are present, what other conditions you have, and how the disease responds.

Saline Nasal Irrigation

Rinsing the nose with salt water using a squeeze bottle or neti pot is one of the simplest and most widely recommended measures. It mechanically washes out mucus, allergens, and inflammatory material, and helps steroid sprays reach the lining. Large-volume rinses (around 200–240 ml per side) are more effective than small sprays. Sterile or previously boiled and cooled water should always be used.

Intranasal Corticosteroid Sprays

Steroid sprays (such as fluticasone, mometasone, or budesonide) reduce inflammation of the nasal lining when used daily over weeks to months. They are the backbone of long-term medical treatment for both CRSsNP and CRSwNP. Used correctly, they are safe for prolonged use; doctors usually advise aiming the spray slightly outward, away from the central wall of the nose, to reduce irritation.

High-Volume Steroid Rinses

For people with stubborn symptoms, particularly after surgery, doctors sometimes mix a steroid preparation (such as budesonide) into a saline rinse. This delivers anti-inflammatory medicine directly to the lining in larger volumes than a spray can achieve.

Short Courses of Oral Steroids

Short courses of oral steroids such as prednisolone can rapidly shrink polyps and reduce inflammation. Because longer-term use brings side effects (raised blood sugar, weight gain, mood changes, bone thinning, eye problems), guidelines recommend reserving oral steroids for flares or for preparation before surgery, rather than as ongoing therapy.

Antibiotics

Antibiotics are useful when there is clear evidence of bacterial infection, particularly during an acute flare-up. Some doctors use longer courses of low-dose macrolide antibiotics for their anti-inflammatory effect in selected patients with CRSsNP who have not responded to other treatment, although evidence is mixed.

Antifungal Treatment

Routine antifungal treatment is not recommended for most chronic sinusitis. In allergic fungal rhinosinusitis, surgical removal of the fungal material followed by anti-inflammatory treatment is the main approach.

Treating Allergies and Asthma

Because chronic sinusitis often coexists with allergic rhinitis and asthma, controlling these conditions is part of the treatment plan. Antihistamines, allergen avoidance, allergen immunotherapy, and good asthma control can all reduce sinus symptoms.

Biologic Medicines

For chronic sinusitis with nasal polyps that has not responded to maximum medical treatment and surgery, or where surgery is not suitable, biologic medicines have changed what is possible. These are injectable antibody drugs that target specific molecules driving type 2 inflammation. Currently available biologics include dupilumab, omalizumab, and mepolizumab. They are typically given as injections every few weeks. In studies, they have been shown to reduce polyp size, improve smell, reduce nasal blockage, and lower the need for repeat surgery. They are usually prescribed by an ENT specialist working with a respiratory or allergy physician.

Aspirin Desensitisation

For people with aspirin-exacerbated respiratory disease, a structured programme of aspirin desensitisation followed by daily aspirin can reduce polyp recurrence and improve symptoms. This is done in specialist centres because of the risk of severe reactions.

Surgical Treatment

Surgery is considered when symptoms continue despite a proper trial of medical treatment, when polyps cause major blockage or loss of smell, or when there is a specific anatomical problem such as a deviated septum contributing to the disease. The aim of surgery is not usually to “cure” chronic sinusitis but to open the sinuses so that medical treatment, particularly steroid rinses and sprays, can work better.

Functional Endoscopic Sinus Surgery (FESS)

FESS may be limited (opening only the worst-affected sinuses) or more extensive (opening all of them and creating a wide common cavity), depending on the disease pattern. People with severe polyp disease, allergic fungal sinusitis, or recurrence after previous surgery may need a more extensive procedure.

Septoplasty and Turbinate Surgery

If a deviated nasal septum or enlarged turbinates contribute to blockage, these may be corrected at the same time as FESS to improve airflow and access for topical treatment.

Balloon Sinuplasty

This technique uses a small balloon to widen the opening of a sinus without removing tissue. It can be useful in selected people with limited disease and no polyps, sometimes under local anaesthesia. It is not generally suitable for severe polyp disease or fungal disease, where tissue removal is needed.

Open Surgery

External approaches are now rarely needed for chronic sinusitis but may still be used for complications, certain tumours, or anatomy that cannot be reached endoscopically.

What to Expect with Sinus Surgery

FESS is usually done under general anaesthesia and often as a day case or short stay. Most people can return to light activity within a week or two, although full healing of the sinus lining takes several weeks to months. Nasal packing, if used, is removed in the early days. After surgery, regular saline rinses and steroid sprays or rinses are essential to keep the newly opened sinuses healthy. Repeat endoscopy visits to clean crusts and check healing are part of normal aftercare.

Common risks include bleeding, infection, scarring inside the nose (synechiae), and temporary changes in smell. Less common but more serious risks — including injury to the eye socket, leak of fluid from around the brain, or significant bleeding — are uncommon in experienced hands but are part of any consent discussion.

Even after a successful operation, polyps and inflammation can return, particularly in CRSwNP. This is why long-term medical treatment after surgery is the rule rather than the exception, and why biologic medicines now play a role for people with recurrent disease.

Lifestyle and Self-Management

Day-to-day habits make a real difference in how chronic sinusitis behaves over time.

• Use saline rinses consistently. Many people stop when they feel better; doing them daily, or as your specialist advises, helps prevent flares.
• Use your steroid spray every day. These medicines work over weeks, not minutes. Stopping and starting reduces their benefit.
• Avoid smoking and second-hand smoke. Both worsen sinus inflammation.
• Manage allergies actively. Identify triggers and reduce exposure where possible — for example, using dust mite covers, washing bedding in hot water, and limiting exposure to known allergens.
• Address indoor air quality. Use exhaust ventilation in kitchens and bathrooms to reduce humidity and mould. Air purifiers may help in some homes.
• Stay hydrated. Adequate fluid intake helps keep mucus thinner and easier to clear.
• Be cautious with decongestant sprays. Over-the-counter sprays such as oxymetazoline relieve blockage quickly but can cause rebound congestion if used for more than a few days. They are not a long-term treatment for chronic sinusitis.
• Treat dental problems. Upper teeth infections can affect the maxillary sinuses.
• Get vaccinated as advised. Influenza and other respiratory vaccines reduce the viral infections that often trigger flares.

Monitoring and Follow-Up

Chronic sinusitis usually needs ongoing follow-up rather than a single course of treatment. Typical elements include:

• Review of symptoms using simple scoring tools, sometimes filled in before each visit
• Periodic nasal endoscopy to check for inflammation, polyp regrowth, or post-surgical healing
• Smell testing in those with reduced or lost smell
• Coordination with allergy and respiratory specialists when asthma or significant allergies are present
• Repeat CT scanning if surgery is being reconsidered or if symptoms change unexpectedly

Discussing realistic goals with your specialist is helpful: for some people, the aim is full symptom control; for others, particularly with severe polyp disease, the aim is meaningful improvement and fewer flare-ups rather than complete resolution.

Complications

Most people with well-managed chronic sinusitis do not develop serious complications, but it is worth knowing what they are.

• Spread of infection to the eye: Swelling, redness, pain, or vision change around the eye is an emergency.
• Spread of infection to the brain or its coverings: Severe headache, fever, neck stiffness, confusion, or seizures need immediate care.
• Mucoceles: Slowly expanding cysts of mucus inside a sinus that can press on nearby structures.
• Bone changes: Long-standing infection can occasionally affect the bone around a sinus.
• Persistent loss of smell: Long-term loss of smell can occur, especially in polyp disease, and may not fully return even with treatment.
• Worsening asthma: Poorly controlled sinus disease can make asthma harder to manage.
• Quality of life impact: Chronic sinusitis is linked with sleep disturbance, fatigue, reduced productivity, and lower mood. These are real consequences and worth raising with your doctor.

Living with Chronic Sinusitis

Chronic sinusitis is, for many people, a long-term condition rather than a one-time problem. The aim of treatment is not necessarily a permanent cure but good day-to-day control, fewer flare-ups, preserved smell where possible, and a normal quality of life.

Practical points that often help:

• Build saline rinses and sprays into your daily routine, like brushing your teeth.
• Keep a simple record of flare-ups, triggers, and what helped. This is useful information at follow-up visits.
• Plan for travel: air travel can worsen sinus pressure; using a steroid spray and saline rinses before flying may help.
• Talk to your specialist about exercise, swimming, and diving — activities that may need adjustment after sinus surgery or during flares.
• Be open about the impact on sleep, mood, and work. These often improve with better disease control and are part of what a thorough treatment plan should address.

Chronic Sinusitis in Children

Chronic sinusitis in children is recognised but behaves somewhat differently from the adult form, and the treatment approach is adjusted accordingly.

Causes and Contributing Factors

In children, large or inflamed adenoids (lymphoid tissue at the back of the nose) are a frequent contributor. Allergies, viral infections, exposure to tobacco smoke, and attendance at daycare with frequent infections all play a role. Nasal polyps are uncommon in young children; their presence may prompt testing for cystic fibrosis.

Symptoms

Children may have:

• Persistent runny nose, often discoloured
• Nighttime cough
• Mouth breathing and snoring
• Bad breath
• Irritability and poor sleep
• Headache, in older children

Facial pain and loss of smell are reported less reliably in young children than in adults.

Diagnosis

Doctors rely on a careful history, examination, and nasal endoscopy where tolerated. CT scans are used more selectively in children than in adults because of radiation exposure, and are usually reserved for cases where surgery is being considered or complications are suspected.

Treatment in Children

Medical treatment is the mainstay and includes saline rinses, steroid sprays at age-appropriate doses, treatment of allergies, and antibiotics during clear flare-ups. When medical treatment is not enough, the first surgical step is usually adenoidectomy — removal of the adenoids — which often produces meaningful improvement on its own. Endoscopic sinus surgery in children is reserved for more severe or persistent cases and is generally more conservative than in adults to allow for ongoing facial growth.

Special Situations

Children with cystic fibrosis, primary ciliary dyskinesia, or significant immune problems need specialised management within a team that includes paediatricians, ENT specialists, and other relevant doctors.

Preventing Flare-Ups and Progression

While chronic sinusitis itself cannot always be prevented, the frequency and severity of flare-ups can usually be reduced.

• Stay consistent with daily nasal hygiene and prescribed sprays
• Treat colds and flu early; consider routine vaccinations as advised
• Wash hands regularly during respiratory infection seasons
• Keep allergies and asthma well-controlled
• Avoid known irritants — tobacco smoke, strong fumes, heavy dust exposure
• Use humidification cautiously in dry environments, ensuring devices are kept clean to avoid mould
• Attend follow-up visits even when feeling well, especially after sinus surgery

When to Seek Urgent Care

Contact a doctor or seek emergency care if you develop:

• Swelling, redness, or severe pain around the eye
• Vision changes, double vision, or difficulty moving the eye
• A severe or sudden headache, especially with fever, neck stiffness, or vomiting
• Confusion, drowsiness, or seizures
• High fever that does not settle with usual measures
• Sudden worsening of facial swelling

These can suggest spread of infection beyond the sinuses and need immediate assessment, regardless of how mild your usual symptoms have been.

Frequently Asked Questions

Will chronic sinusitis ever go away completely?

For some people, particularly those without polyps and with treatable contributing factors such as allergies or anatomical narrowing, symptoms can settle for long periods or resolve. For others, especially with nasal polyps or coexisting asthma, chronic sinusitis behaves more like a long-term condition that is managed rather than cured. Modern treatment, including newer biologic medicines, has improved long-term control significantly.

Do I need surgery if antibiotics keep helping me temporarily?

Whether to consider surgery is a clinical decision made with your ENT specialist. In general, repeated reliance on antibiotics with quick relapse, ongoing symptoms despite proper medical treatment, large polyps, or specific anatomical problems are reasons surgery may be discussed. Surgery is usually offered after a fair trial of medical therapy rather than as a first step.

How long does recovery from sinus surgery take?

Most people return to light daily activity within one to two weeks. The inside of the nose continues healing for several weeks to a few months. Saline rinses and steroid sprays are usually started or continued soon after surgery, and follow-up visits with endoscopy help guide the healing process.

Are nasal steroid sprays safe for long-term use?

Modern intranasal corticosteroid sprays are designed to act locally on the nasal lining with very little absorption into the body. Major guidelines describe them as safe for long-term daily use in adults and, at appropriate doses, in children. Possible local side effects include nasal dryness and occasional minor nosebleeds; these can often be reduced by adjusting spray technique.

Can chronic sinusitis cause loss of smell permanently?

Reduced smell is common in chronic sinusitis, particularly with polyps. Many people regain some or all of their smell with effective treatment, including steroids, surgery, and biologic medicines. However, long-standing severe disease can lead to lasting smell loss, which is one reason early and sustained treatment matters.

What are biologics, and who can have them?

Biologics are injectable antibody medicines that block specific parts of the type 2 inflammation pathway. For chronic sinusitis, they are mainly used in adults with severe polyp disease that has not responded to surgery and standard medical treatment, or for whom surgery is not suitable. The decision to start a biologic is made by a specialist team after considering the type of disease, other conditions such as asthma, and individual response to other treatments.

Is chronic sinusitis contagious?

Chronic sinusitis itself is not contagious. The underlying viral or bacterial infections that may trigger flare-ups can spread between people, but the chronic inflammation pattern is not something that passes from one person to another.

Can changes in diet help?

There is no single proven “chronic sinusitis diet.” For some people with aspirin-exacerbated respiratory disease, specific dietary approaches are studied as add-on options. For most others, a balanced diet, good hydration, and management of any specific food allergies are sensible. Major dietary changes should be discussed with your doctor.

How often will I need follow-up?

This varies. After a new diagnosis or after sinus surgery, follow-up is usually more frequent — sometimes every few weeks initially — and then spaces out as the condition stabilises. Long-term, many people are seen once or twice a year, with extra visits during flare-ups or when treatment is being changed.

Conclusion

Chronic sinusitis is a long-term inflammatory condition rather than a series of unrelated infections, and treating it well usually means combining several approaches over time: daily nasal hygiene, anti-inflammatory medicines, careful management of allergies and asthma, and, when needed, surgery or biologic treatment. The right plan depends on the type of disease, contributing factors, previous treatments, and your own goals.

If you already have a diagnosis, the most useful step is a clear, structured conversation with an ENT specialist about which type of chronic sinusitis you have, what has been tried, and what the next options are. With current treatments, most people can expect meaningful and lasting improvement, even when complete cure is not possible.