What Is FESS? A Complete Guide to Functional Endoscopic Sinus Surgery

Written By Matt Ward

If you suffer from chronic sinusitis, nasal blockage, or recurrent sinus infections, you may have been told you need FESS (Functional Endoscopic Sinus Surgery). But what exactly is it — and when is it needed?

At Hampshire ENT Clinics, we specialise in advanced, minimally invasive sinus surgery, helping patients across Portsmouth, Winchester, Salisbury and the South Coast breathe more easily and reduce long-term sinus problems.

👃 What Is FESS?

FESS (Functional Endoscopic Sinus Surgery) is a modern surgical procedure used to treat blocked or diseased sinuses.

It is performed:

  • Through the nostrils (no external cuts)

  • Using a fine endoscope (camera)

  • With specialised instruments to open blocked sinus pathways

The aim is to restore natural drainage and ventilation of the sinuses, rather than remove large amounts of tissue.

🤧 What Conditions Does FESS Treat?

FESS is most commonly used for:

  • Chronic rhinosinusitis (CRS) lasting more than 12 weeks

  • Nasal polyps causing blockage and loss of smell

  • Recurrent sinus infections

  • Sinus headaches and facial pressure

  • Blocked nose not improving with medication

  • Complicated sinus disease near the eye or brain

  • Revision sinus surgery (when previous surgery has not worked)

💊 Do I Need Surgery — or Can It Be Treated Without It?

Most patients are treated first with medical therapy, including:

  • Nasal steroid sprays

  • Saline rinses

  • Antibiotics (when appropriate)

  • Oral steroids (in selected cases)

  • Allergy treatment

FESS is only recommended when these treatments have not worked or symptoms keep returning.

🩺 What Happens During FESS?

FESS is usually performed under general anaesthetic as a day-case procedure.

During surgery:

  • A small camera is placed inside the nose

  • Blocked sinus openings are gently widened

  • Inflamed tissue or polyps are removed

  • Normal airflow and drainage are restored

In more complex cases, we use image-guided navigation, which works like a “sat nav” during surgery to improve precision and safety.

⏱️ Recovery After FESS

Most patients recover quickly:

First few days:

  • Mild congestion and nasal blockage

  • Small amount of bleeding or blood-stained discharge

1–2 weeks:

  • Breathing gradually improves

  • Crusting reduces with saline rinses

2–4 weeks:

  • Significant improvement in symptoms

  • Return to normal activities

You will be given a clear aftercare plan, including nasal rinses and sprays to support healing.

🌟 Benefits of FESS

Patients often experience:

  • Improved nasal breathing

  • Fewer sinus infections

  • Reduced facial pressure

  • Better sense of smell

  • Improved sleep and energy

For many patients, it is life-changing, particularly if symptoms have been ongoing for years.

⚙️ Why Choose Hampshire ENT Clinics for FESS?

  • Consultant-led specialist care

  • Expertise in advanced and revision sinus surgery

  • Use of image-guided navigation technology

  • Access to modern private hospitals across Hampshire

  • Personalised treatment plans from diagnosis to recovery

📍 Where Is FESS Performed?

FESS is performed at our partner hospitals across:

  • Portsmouth (Queen Alexandra Hospital / Spire Portsmouth)

  • Winchester (Medicana Winchester)

  • Salisbury (New Hall Hospital)

🧠 Final Thoughts

FESS is a safe, effective, and minimally invasive treatment for chronic sinus problems when medical therapy is not enough.

The key is accurate diagnosis and selecting the right patients for surgery — ensuring the best possible outcomes.

📞 Book a Consultation

If you are struggling with persistent sinus problems, nasal blockage, or recurrent infections, expert help is available.

Contact Hampshire ENT Clinics today to arrange a specialist assessment and discuss whether FESS is right for you.

FESS (Sinus Surgery) – Frequently Asked Questions

How do I know if I actually need FESS?

Most patients do not need surgery initially. FESS is considered when:

  • Symptoms persist for more than 12 weeks despite treatment

  • You have repeated flare-ups affecting quality of life

  • Nasal polyps or structural blockage are present

  • CT scan confirms ongoing sinus disease

The decision is based on a combination of symptoms, examination, and imaging, not just one factor.

Will FESS cure my sinus problems permanently?

FESS is designed to improve long-term control, not “switch off” sinus disease completely.

Most patients experience:

  • Fewer infections

  • Easier breathing

  • Better response to sprays

However, conditions like chronic rhinosinusitis are inflammatory, so ongoing medical treatment (e.g. nasal sprays) is often still needed.

What does “functional” sinus surgery mean?

“Functional” means the surgery aims to restore normal sinus function, rather than remove large amounts of tissue.

The goal is to:

  • Open natural drainage pathways

  • Improve airflow

  • Allow medication (sprays/rinses) to work more effectively

Will there be any scars on my face?

No. FESS is performed entirely through the nostrils, so there are:

  • No external cuts

  • No visible scars

Is FESS painful?

Most patients are surprised at how comfortable recovery is.

You are more likely to experience:

  • Nasal congestion

  • Pressure or fullness

Rather than significant pain. Simple pain relief is usually sufficient.

How long before I can return to work or normal life?

  • Desk-based work: usually 5–10 days

  • Exercise: after ~2 weeks

  • Full recovery: 3–4 weeks

This varies depending on the extent of surgery.

Will my nose be packed after surgery?

In many cases, nasal packing is avoided.
If internal support is needed, we often use dissolvable materials, which are far more comfortable.

What is image-guided sinus surgery?

Image guidance is an advanced technology used in complex cases.

It acts like a GPS system for the sinuses, allowing the surgeon to track instruments in real time relative to your CT scan.

This improves:

  • Precision

  • Safety (especially near the eye or brain)

  • Confidence in revision surgery

What happens if I don’t have surgery?

Without surgery, some patients continue to experience:

  • Ongoing infections

  • Chronic blockage

  • Reduced smell

  • Repeated courses of antibiotics or steroids

In selected patients, surgery reduces reliance on repeated medication.

Can sinus surgery improve my sense of smell?

Yes — particularly in patients with nasal polyps or blockage.

Smell often improves gradually after surgery, although recovery can vary depending on the underlying condition.

I’ve already had sinus surgery — can it be done again?

Yes. Revision FESS is commonly performed when:

  • Symptoms return

  • Scar tissue forms

  • Disease progresses

These cases require specialist expertise and careful planning, which is a key part of advanced rhinology practice.

Is FESS safe?

FESS is a well-established and safe procedure when performed by experienced surgeons.

As with any surgery, there are risks, but these are uncommon and discussed in detail during consultation.

Will I still need nasal sprays after surgery?

Yes — and this is important.

FESS actually makes nasal sprays work better, by allowing medication to reach deeper into the sinuses.
Long-term success depends on combining surgery with appropriate medical treatment.

Where will my surgery take place?

FESS is performed at specialist partner hospitals across Hampshire, including:

  • Portsmouth

  • Winchester

  • Salisbury

You will be treated in a modern, consultant-led environment with access to advanced technology.

What is the biggest benefit patients notice after FESS?

Most patients describe:

  • Easier breathing

  • Fewer infections

  • Better sleep

  • Reduced reliance on medication

For many, it is a significant improvement in day-to-day quality of life.

Matt Ward
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