A fungal sinus infection, also called fungal sinusitis, is when fungus causes an infection of the sinuses. The sinuses are air-filled cavities in the head that produce mucus (snot), which drains out ...

Nasal polyps are teardrop-shaped, soft tissue growths that form in the lining of your nasal cavity and sinuses (the hollow spaces in the bones of your face). Nasal polyps are benign, which means they ...