Whats in store when you wake up after nasal polyps surgery. Its not a disease exactly , but more accurately chronic inflammation of the sinuses due to a variety of factors that we’re not exactly sure about , but its widely thought that diet and environmental factors play a large part. The inflammation causes fluid to build up in the nasal cells , and over time gravity causes these to pull down and form polyps , which cause blockages and hence Nasal Polyps.