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Sinus & Allergy

Causes of Chronic Sinusitis

Chronic sinusitis rarely has a single cause. Allergy, structural narrowing, polyps and infection often overlap.

28 January 2026 4 min readBy Dr. Aashima Chopra

Sinusitis is called chronic when symptoms such as blockage, discharge, facial pressure or reduced smell continue for around twelve weeks or more.

Common contributing factors

Allergic rhinitis, which keeps the nasal lining swollen and the sinus openings narrowed.

Structural factors such as a deviated nasal septum or narrow drainage pathways.

Nasal polyps, repeated infections, and irritants such as smoke and pollution.

Why identifying the cause matters

Treatment is more effective when the underlying driver is addressed, rather than treating each infection in isolation.

Nasal endoscopy, allergy assessment and imaging help build an accurate picture.

Common questions

Can chronic sinusitis be treated without surgery?

Often yes. Many patients improve with nasal sprays, saline rinses and allergy management used consistently.

This article is general information and not a substitute for medical advice. Please consult a doctor about your own symptoms.

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