Understanding Chronic Sinusitis: Causes, Symptoms & Modern Care
What causes paranasal sinus blockage, when medical therapies suffice, and how Functional Endoscopic Sinus Surgery (FESS) restores natural sinus ventilation without external incisions.
The human skull contains four paired paranasal sinus air cavities: maxillary, ethmoid, frontal, and sphenoid. In healthy individuals, these produce mucus that traps dust and pathogens, which micro-cilia constantly sweep through narrow ostia into the nasal cavity.
When chronic inflammation, allergy, or anatomical obstruction blocks these narrow drainage pathways, mucus stagnates. Bacteria or fungi proliferate, leading to persistent facial heaviness, purulent nasal discharge, hyposmia (loss of smell), and chronic headaches.
While initial episodes are treated medically with saline irrigations and intranasal steroid sprays, refractory cases lasting beyond 12 weeks often benefit from Functional Endoscopic Sinus Surgery (FESS). FESS uses optical cameras through the nostrils to widen natural drainage channels while preserving healthy mucosa.
Clinical Pearls & Key Takeaways
- Symptoms lasting longer than 12 weeks indicate chronic rhinosinusitis, requiring formal endoscopic evaluation.
- Routine over-the-counter decongestant nasal drops (e.g. xylometazoline) should NEVER be used for more than 5 consecutive days to prevent rhinitis medicamentosa (rebound congestion).
- Modern FESS utilizes dissolvable bio-absorbable spacers, avoiding painful traditional packing removal.

Dr. Radhamadhab Sahu honored on stage at the AOI State CME on Endoscopic Sinus Surgery (FESS) & Allergic Rhinitis.
Evaluations are conducted with advanced high-definition endoscopy at SUM Ultimate Medicare and Dr. Radhamadhab ENT and Cancer Clinic.
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