Yes you need a surgery to clear your sinuses off the fungal debris, as it won't come out by itself.
The surgery will be done endoscopically through the nostrils hence no scar will be seen
Next Steps
need to take a course of antibiotics and anti inflammatory drugs before the surgery as it will reduce the bleeding during the surgery hence leading to a better clearance of the disease
Health Tips
need to do nasal douching to wash the sinuses after surgery to get better relief