Chronic Sinusitis: Why It Keeps Coming Back and What Actually Treats It
Chronic sinusitis is one of the most common chronic health conditions in India, yet it is widely mismanaged — either undertreated with repeated short antibiotic courses that never resolve the underlying problem, or overtreated with surgery before adequate medical therapy has been tried. Understanding what chronic sinusitis actually is, what causes it, and what modern evidence-based treatment involves can save you years of frustration.
What Is Chronic Sinusitis — and What It Is Not
Chronic rhinosinusitis (CRS) is defined as inflammation of the nose and paranasal sinuses lasting 12 weeks or more, despite treatment. It is NOT simply a persistent infection. In most cases, chronic sinusitis is an inflammatory condition driven by allergy, immune dysregulation or structural obstruction — with bacterial infection being a secondary complication rather than the primary cause.
This is why antibiotics alone fail: they may clear a superimposed bacterial infection temporarily, but the underlying mucosal inflammation remains, and symptoms recur within weeks.
Symptoms of Chronic Sinusitis
- Nasal blockage or congestion lasting more than 12 weeks
- Thick nasal or post-nasal discharge (yellow, green or clear)
- Facial pressure or fullness — typically over the cheeks, forehead or between the eyes
- Reduced or absent sense of smell (anosmia or hyposmia)
- Chronic fatigue and malaise
- Recurrent headaches, worse when bending forward
- Ear fullness or pressure (from Eustachian tube involvement)
- Persistent throat clearing and cough from post-nasal drip
The Two Main Types: With and Without Polyps
Chronic rhinosinusitis is broadly divided into two types — CRS without nasal polyps (CRSsNP) and CRS with nasal polyps (CRSwNP). Polyps are soft, grape-like growths that develop from the sinus lining and protrude into the nasal cavity. They are not cancerous. However, they cause significant obstruction, loss of smell and recurrent infections — and they require specific treatment.
CRS with polyps is frequently associated with allergy, aspirin sensitivity and asthma (the “Samter’s triad”). Treating the underlying allergy is central to controlling polyp recurrence after surgery.
Diagnosis: What a Proper Evaluation Involves
Accurate diagnosis requires nasal endoscopy — visualisation of the nasal cavity and sinus drainage pathways using a rigid or flexible endoscope. This is not optional; clinical examination alone is insufficient. A CT scan of the paranasal sinuses is the gold standard for imaging — it maps the extent of disease, identifies anatomical variants and guides surgical planning. MRI is used only in specific circumstances such as suspected fungal sinusitis or orbital/intracranial extension.
Evidence-Based Medical Treatment
First-line medical treatment for chronic sinusitis includes high-volume nasal saline irrigation (using a neti pot or squeeze bottle with isotonic or hypertonic saline), intranasal corticosteroid sprays used correctly and consistently for at least 12 weeks, and treatment of underlying allergic rhinitis. In CRS with polyps, a short course of systemic corticosteroids may be used to rapidly reduce polyp bulk before maintenance therapy.
Antibiotics should not be used routinely or repeatedly. Their role is limited to confirmed acute bacterial exacerbations. Long-term low-dose macrolide antibiotics have an anti-inflammatory role in selected patients with CRS without polyps and high neutrophilic inflammation — but this is a specialist decision.
When Is Surgery (FESS) Required?
Functional Endoscopic Sinus Surgery (FESS) is indicated when adequate medical treatment — typically 12+ weeks of intranasal corticosteroids, nasal irrigation and allergy management — has failed to provide sufficient symptom control. FESS is also indicated for complications of sinusitis, suspected fungal sinusitis, or anatomical abnormalities blocking sinus drainage.
FESS is performed entirely through the nostrils using a rigid endoscope — no external cuts. It opens the natural drainage pathways of the sinuses, removes polyps and diseased mucosa, and allows medications to reach areas that were previously blocked. Recovery takes 2–4 weeks. Surgery improves quality of life significantly but does not cure the underlying inflammatory tendency — ongoing medical treatment and allergy management after surgery is essential to prevent recurrence.
The Allergy Connection — Why Treating Rhinitis Changes Everything
Allergic rhinitis is the single most common predisposing factor for chronic sinusitis. Allergen exposure causes mucosal swelling that obstructs sinus drainage, impairs mucociliary clearance and promotes the inflammatory milieu that drives CRS. In patients with both conditions, treating the allergy — with nasal sprays, antihistamines and where appropriate, immunotherapy — significantly reduces the frequency and severity of sinus episodes and reduces the risk of polyp recurrence after surgery.
Dr Pranshu Mehta is an ENT Surgeon at Rog Nidan ENT & Dental Clinic, C-2/275 Janakpuri, New Delhi. For chronic sinusitis evaluation and FESS: WhatsApp +91 98186 35660. Watch: @TheENTSurgeons on YouTube.