FESS (Functional Endoscopic Sinus Surgery) is a minimally invasive surgical procedure used to treat chronic sinus infections, nasal polyps, and other obstructive sinus conditions.
Unlike older “open” sinus surgeries that required external incisions, FESS is performed entirely through the nostrils using an endoscope (a thin tube with a camera and light). This allows the surgeon to see and clear blockages with extreme precision while preserving healthy tissue.
Why is FESS Performed?
It is typically considered the “gold standard” for patients who have not found relief from 12+ weeks of medical therapy (antibiotics, steroids, and nasal rinses). Common reasons include:
Chronic Sinusitis: Long-term inflammation of the sinus lining.
Nasal Polyps: Non-cancerous growths that block airflow.
Structural Issues: Such as a deviated septum or narrowed sinus drainage pathways.
Recurrent Infections: Sinus infections that return multiple times a year.
The 2025 Procedure Experience
Anesthesia: Performed under general anesthesia.
Duration: Usually takes 2 to 3 hours depending on how many sinus cavities are involved.
The Technique: The surgeon uses tiny instruments to remove diseased tissue, bone fragments, or polyps. In 2025, many surgeons use bioresorbable (dissolvable) packing, which eliminates the need for the painful removal of gauze sponges after surgery.
Image Guidance: High-definition 3D mapping (Navigation) is often used during the surgery to act like a “GPS” for the surgeon, increasing safety near the eyes and brain.
Recovery Timeline
Most patients return to light activity within 3 to 7 days, though full healing of the sinus lining takes 1 to 2 months.
| Phase | What to Expect |
| Days 1–3 | Nasal congestion (feeling “stuffed up”), mild headache, and pinkish/bloody discharge. |
| Week 1 | Most patients return to work/school. No nose-blowing or heavy lifting. |
| Weeks 2–4 | Breathing begins to improve significantly. Nasal saline rinses are critical during this time. |
| Month 2 | Full internal healing. Sense of smell usually returns to normal or improves. |
FESS (Functional Endoscopic Sinus Surgery) is a minimally invasive surgical procedure used to treat chronic sinus infections, nasal polyps, and other obstructive sinus conditions.
Unlike older “open” sinus surgeries that required external incisions, FESS is performed entirely through the nostrils using an endoscope (a thin tube with a camera and light). This allows the surgeon to see and clear blockages with extreme precision while preserving healthy tissue.
Why is FESS Performed?
It is typically considered the “gold standard” for patients who have not found relief from 12+ weeks of medical therapy (antibiotics, steroids, and nasal rinses). Common reasons include:
Chronic Sinusitis: Long-term inflammation of the sinus lining.
Nasal Polyps: Non-cancerous growths that block airflow.
Structural Issues: Such as a deviated septum or narrowed sinus drainage pathways.
Recurrent Infections: Sinus infections that return multiple times a year.
The 2025 Procedure Experience
Anesthesia: Performed under general anesthesia.
Duration: Usually takes 2 to 3 hours depending on how many sinus cavities are involved.
The Technique: The surgeon uses tiny instruments to remove diseased tissue, bone fragments, or polyps. In 2025, many surgeons use bioresorbable (dissolvable) packing, which eliminates the need for the painful removal of gauze sponges after surgery.
Image Guidance: High-definition 3D mapping (Navigation) is often used during the surgery to act like a “GPS” for the surgeon, increasing safety near the eyes and brain.
Recovery Timeline
Most patients return to light activity within 3 to 7 days, though full healing of the sinus lining takes 1 to 2 months.
| Phase | What to Expect |
| Days 1–3 | Nasal congestion (feeling “stuffed up”), mild headache, and pinkish/bloody discharge. |
| Week 1 | Most patients return to work/school. No nose-blowing or heavy lifting. |
| Weeks 2–4 | Breathing begins to improve significantly. Nasal saline rinses are critical during this time. |
| Month 2 | Full internal healing. Sense of smell usually returns to normal or improves. |
Critical Aftercare Rules
To prevent scar tissue (adhesions) from closing the new openings:
Saline Rinses: Using a Neti pot or squeeze bottle 2–4 times a day is the most important step to wash out old blood and crusts.
No Nose Blowing: For at least 7–14 days. If you must sneeze, do so with your mouth open to avoid pressure buildup.
Head Elevation: Sleep with 2–3 pillows for the first week to reduce swelling.
Avoid Irritants: No smoking, swimming in chlorinated pools, or dusty environments for 4 weeks.
Success Rates & Risks (2025)
Success Rate: Studies show an 80% to 90% success rate in significantly reducing symptoms and improving quality of life.
Minor Risks: Bleeding (3%), temporary loss of smell, or minor infection.
Rare Risks: Because the sinuses are near the eyes and brain, extremely rare complications include cerebrospinal fluid (CSF) leaks or double vision (<0.5%).
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