Nasal Polyps A quick guide for understanding nasal polyps & the different treatments available Nasal polyps are soft, abnormal, swollen, sac-like/grape-like growths of inflamed tissue. This usually lines the inside of your nose, arising from your sinuses. The sinuses are a group of air-filled spaces inside the bones of your face. They connect with the nasal cavity. This is the large, air-filled space behind your nose. Normally, these…