Final answer:
Functional endoscopic sinus surgery (FESS) is a minimally invasive surgical procedure used to treat chronic sinusitis and other sinus conditions. It involves the use of an endoscope to visualize and access the sinus cavities, allowing for the removal of blockages and diseased tissue. FESS can greatly improve symptoms such as facial pain, congestion, and nasal discharge.
Step-by-step explanation:
Functional endoscopic sinus surgery (FESS) is a minimally invasive surgical procedure used to treat chronic sinusitis and other sinus conditions.
Through the use of an endoscope, a tube-like instrument with a light and camera, the surgeon is able to visualize and access the sinus cavities without the need for traditional open surgery.
This procedure allows for the removal of blockages and diseased tissue, as well as the restoration of normal sinus drainage. It can significantly improve symptoms such as facial pain, congestion, and nasal discharge.