FESS – Functional Endoscopic Sinus Surgery


Functional endoscopic sinus surgery (FESS) is a procedure performed to treat chronic sinusitis. Symptoms of this chronic inflammation include headaches, impaired nasal patency, weakened sense of smell and protracted upper respiratory tract infections. The procedure is performed when drug treatment is ineffective.

Functional endoscopic sinus surgery (FESS) is performed completely intranasally, without making any incision on the skin. It involves widening the physiological sinus outlets and removing lesions (polyps, lingering mucous secretions, fungal masses, thickened mucous membranes) from the sinuses. The scope of the surgery is determined by imaging tests (CT scans). During the operation, nasal septoplasty or conchoplasty may be performed. After the surgery, a self-absorbent nasal dressing is placed.


Preoperative instructions:

  • Full blood count
  • Coagulation pathways
  • Electrolytes, CRP
  • Blood type


Postoperative instructions:

  • Avoid physical strain
  • Use donor steroids
  • Nasal irrigation

2-3 hours

Duration of the treatment

1-2 days

Stay in clinic



1 month

Recommended stay under the supervision of a doctor