Sinusitis

Sinusitis is inflammation of the mucosa lining the air-filled sinus cavities within the facial and skull bones. In current terminology it is also called rhinosinusitis, because the inflammation almost always involves the nasal lining as well. When the mucosa swells, the sinus channels become blocked, mucus drainage is impaired, and secretions trapped in the cavities create the basis for pressure, pain, congestion and infection.

Summary: Sinusitis is classified by duration. Acute sinusitis lasts under 4 weeks, is usually viral and settles with supportive care. Chronic sinusitis lasts longer than 12 weeks; structural causes such as septal deviation, nasal polyps or turbinate enlargement may lie beneath it, and treatment combines long-term medical therapy with endoscopic sinus surgery when needed. Antibiotics are not required for every case of sinusitis.

Table of Contents

• How Are Acute and Chronic Sinusitis Distinguished?
• What Are the Symptoms of Sinusitis?
• Viral or Bacterial? Does Every Sinus Infection Need Antibiotics?
• Home Support for Sinus Infections
• Medical Treatment
• Structural Causes of Chronic Sinusitis
• Who Is a Candidate for Endoscopic Sinus Surgery (FESS)?
• Childhood Sinusitis and the Adenoids
• Sinusitis Care for International Patients
• When Should You See an ENT Specialist?
• Frequently Asked Questions
• References

How Are Acute and Chronic Sinusitis Distinguished?

Sinusitis is separated according to its duration, and this distinction is the single most important factor in choosing treatment. Acute sinusitis lasts under 4 weeks, usually begins after a common cold and often resolves on its own, whereas chronic sinusitis lasts longer than 12 weeks, returns when medication is stopped, or never fully clears. A picture lasting 4 to 12 weeks is called subacute sinusitis.

These established clinical boundaries — 4 weeks and 12 weeks — are not arbitrary; an ENT physician builds the treatment ladder around this timeline. Patients who have four or more acute episodes a year, with complete recovery in between, are described as having recurrent acute sinusitis, and the underlying predisposition is investigated.

Feature	Acute sinusitis	Chronic sinusitis
Duration	Under 4 weeks	Over 12 weeks
Most common cause	Viral (common cold) infection	Inflammation + drainage failure + structural causes
Typical symptom course	Sudden onset, self-limiting	Persistent, fluctuating, never fully clears
Frequency of structural cause	Usually none	Septal deviation, polyps, turbinate enlargement common
First-line treatment	Supportive care (saline, rest)	Long-term spray + saline, trigger management
Antibiotics	Only with bacterial signs	Only during acute flare-ups
Need for surgery	Rare	Considered in drug-resistant or polyp cases

What Are the Symptoms of Sinusitis?

The classic picture in which an ENT physician makes a preliminary diagnosis rests on two main symptoms: nasal congestion and nasal or postnasal discharge. When facial pain or pressure and a reduced sense of smell accompany these, the diagnosis strengthens. Symptoms often worsen on bending forward, which helps distinguish sinusitis from other causes.

Other common findings include:

• Facial pain and pressure: Fullness across the forehead, under the eyes and in the cheeks, increasing when bending forward.
• Nasal discharge: Clear, yellow or greenish; colour alone is not proof of bacterial infection.
• Postnasal drip: Secretions running down the back of the throat, causing a lump sensation, voice change and, particularly at night, a cough.
• Reduced smell and taste: Mucosal swelling blocks air from reaching the smell region.
• Headache, fatigue and mild fever: More prominent in the acute picture.
• Toothache: Especially in the upper back molars, which suggests dental maxillary sinusitis.

Viral or Bacterial? Does Every Sinus Infection Need Antibiotics?

No. The vast majority of acute sinusitis is caused by viral infections — essentially a continuation of the common cold — and does not need antibiotics. Only a small proportion of cases become bacterial. Unnecessary antibiotics drive resistance and cause avoidable side effects, so rational antibiotic use is essential; antibiotics are not needed for every sinus infection.

Findings that point towards bacterial sinusitis include symptoms that last beyond 10 days without improving, that worsen rather than settle, high fever, unilateral thick purulent discharge, and the “double sickening” pattern of improving and then deteriorating again. When these are present, a physician may start antibiotics. Coloured nasal discharge on its own is not proof of bacterial infection, since viral sinusitis can also produce yellow-green discharge.

Home Support for Sinus Infections

Measures used at home in acute sinusitis are supportive — they ease the recovery process rather than cure the condition. The most useful is saline nasal rinsing, which mechanically clears trapped secretions, moistens the mucosa and aids drainage. These approaches relieve symptoms but do not resolve any underlying structural problem.

• Saline irrigation: High-volume, gentle saline rinsing is the most effective home measure and can be repeated a few times a day.
• Steam inhalation: Warm steam offers temporary relief of the mucosa; used in moderation, not excessively.
• Fluids and rest: Plenty of fluid helps thin secretions and supports recovery.
• Avoiding cigarette smoke: Smoke irritates the mucosa and delays healing.
• Decongestant spray (short-term): Opens congestion quickly but should not be used for more than 3–5 days, or it causes rebound congestion.

Medical Treatment

Sinusitis treatment is delivered in steps according to the picture. In acute viral sinusitis, 7–10 days of supportive care — saline rinsing, an intranasal steroid spray and pain relief as needed — is usually enough. When bacterial signs become clear, the physician adds an antibiotic whose type and duration are chosen for the individual patient.

In chronic sinusitis, treatment has several components and requires management lasting months: a daily, long-term intranasal corticosteroid spray with correct technique, regular high-volume saline rinses, short corticosteroid courses during flare-ups, and parallel treatment of accompanying conditions such as allergy, asthma or reflux. Antibiotics alone are not the answer in chronic disease, where the problem is usually impaired drainage and an inflammatory bed rather than a single infection.

Structural Causes of Chronic Sinusitis

Chronic sinusitis is rarely explained by a single micro-organism; it most often arises from the combination of prolonged inflammation, impaired drainage and individual predisposition. Structural causes that mechanically narrow the sinus openings come to the fore in this picture, and they are a frequent reason for sinusitis that recurs despite medical treatment.

• Septal deviation: A deviated nasal septum disrupts airflow and sinus drainage; the lasting solution is straightening the partition with septoplasty.
• Nasal polyps: Grape-like drooping of the mucosa blocks the airway and sinus openings; this is covered in detail on the nasal polyps page.
• Turbinate enlargement: Hypertrophy of the turbinate tissues inside the nose narrows drainage; assessment is explained on the nasal turbinate page.

When these structural problems are identified, they are usually corrected in the same session as the sinus surgery. Medical treatment carried out without addressing the structural cause often fails to give a lasting result.

Who Is a Candidate for Endoscopic Sinus Surgery (FESS)?

Functional Endoscopic Sinus Surgery (FESS) is considered in chronic sinusitis that does not respond adequately to medical treatment, that flares up frequently, that involves nasal polyps, or that presents with complications threatening the eye. It is performed without any external incision, through the nostrils under endoscopic guidance. The aim is to open the blocked sinus openings, clear diseased tissue and preserve the healthy mucosa.

The critical point to understand is that surgery does not eradicate chronic sinusitis on its own; it removes the mechanical obstacles that stand in the way of medication reaching the sinuses. Spray and saline rinse treatment must therefore continue without interruption after surgery. Any accompanying septal deviation, turbinate enlargement or polyps can be corrected together in the same session.

A related approach is the concept of balloon sinuplasty: in carefully selected cases, a small balloon is inflated at the mouth of a blocked sinus to widen the drainage pathway, with limited tissue removal. This method is not suitable for every patient, and candidacy is determined after endoscopic and CT assessment.

This content is for informational purposes only; diagnosis and treatment require an in-person physician examination. Surgical outcomes vary from person to person.

Childhood Sinusitis and the Adenoids

Sinusitis in children differs from the adult form in important ways. Because the sinuses are not fully developed at birth, the picture typically originates from the maxillary and ethmoid sinuses. The most common triggers are a viral upper respiratory tract infection and accompanying enlargement of the adenoid tissue.

An enlarged adenoid acts as both a bacterial reservoir and a mechanical obstacle, setting the stage for recurrent childhood sinusitis; an adenoid hypertrophy assessment is therefore recommended in repeated cases. If a child has eyelid swelling or redness, a vision problem, severe headache or high fever, urgent assessment is required, because sinusitis complications can progress more rapidly in children than in adults.

Sinusitis Care for International Patients

International patients travelling to Istanbul for sinusitis care usually begin with a remote consultation, sharing their history and any existing CT or endoscopy records so that the picture can be reviewed before travel. On arrival, an in-person examination, nasal endoscopy and, where indicated, paranasal sinus CT confirm the diagnosis and clarify whether the problem is primarily medical or structural. When endoscopic sinus surgery is planned, the assessment, procedure and early follow-up are coordinated within a single visit, with the maintenance spray and saline routine explained for continuation at home.

When Should You See an ENT Specialist?

Although sinusitis is often managed at home and in primary care, some situations call for specialist assessment. An upper respiratory infection that fails to improve or worsens beyond 10 days, four or more acute episodes a year, or complaints lasting longer than 12 weeks are the main reasons for an ENT examination.

Prompt medical attention is advised in the following situations:

• Progressive loss of smell
• Unilateral, thick purulent or blood-stained discharge
• Unilateral sinusitis together with upper toothache (which may be dental in origin)
• Eye swelling, redness, a change in vision or severe headache (urgent)
• Persistent sinus complaints together with a history of asthma, allergy or an aspirin reaction

Correctly classified and treated with the appropriate stepwise approach, sinusitis is largely controllable and directly improves quality of life. The key is to evaluate the underlying basis — anatomy, allergy, asthma and environment — as a whole, rather than becoming trapped in an antibiotic–corticosteroid–antibiotic cycle.

When structural correction for chronic sinusitis coincides with aesthetic concerns about nasal shape, the function-aesthetics balance is discussed on the rhinoplasty page.

Frequently Asked Questions

How do you make a sinus infection go away faster? Most acute sinus infections are viral, so there is no magic treatment that speeds them up. Saline irrigation, steam, plenty of fluids and rest ease the recovery, and symptoms usually settle within 7–10 days. Pictures lasting more than 10 days or worsening need a physician assessment.

Can sinusitis clear up on its own? Yes. Because most acute sinusitis is viral, it commonly resolves on its own within about 7–10 days with supportive care. Chronic sinusitis lasting more than 12 weeks rarely clears without treatment and usually needs ongoing medical management and, in selected cases, surgery.

How can I clear my sinuses at home? The most effective home method is high-volume saline nasal rinsing, which clears trapped secretions and aids drainage. Steam inhalation offers temporary relief. Decongestant sprays should not be used for more than 3–5 days, or they cause rebound congestion.

What is the best treatment for severe or persistent sinusitis? For persistent sinusitis, treatment is built stepwise: daily intranasal corticosteroid spray, regular saline rinses, short corticosteroid courses in flare-ups, and management of allergy or asthma. When medication fails or structural causes or polyps are present, endoscopic sinus surgery is considered after full assessment.

Does chronic sinusitis always require surgery? No. The first step in chronic sinusitis is medical treatment. Surgery (FESS) is considered in selected cases that resist medication, flare up frequently, or involve polyps or a structural cause. Spray and saline rinse treatment continues even after surgery.

References

• American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS)
• National Institutes of Health — MedlinePlus, Sinusitis
• World Health Organization — Antimicrobial Resistance and Rational Antibiotic Use