Understanding Nasal Polyps Nasal polyps are soft, painless, and noncancerous growths that develop in the lining of the nasal passages and sinuses due to chronic inflammation. While small nasal polyps may go unnoticed, larger polyps can cause nasal obstruction, difficulty breathing, and an increased risk of chronic sinus infections. Nasal polyps can occur in one or both nostrils an... https://venturaent.com/nasal-polyps-what-they-are-and-when-to-seek-treatment/