Who Is at Risk?
Although everyone is at risk for sinusitis, some factors play into how high or low these risk levels are.
Sinusitis is more commonly contracted by people who already have structural differences in their nasal cavities. These include developing polyps, having narrow drainage ducts or even deficiencies in their immune system. Structurally narrow drainage ducts are much easier to clog than normal sized ones; hence they are easier to irritate and swell up. Deficiencies in the immune system could make someone more likely to catch a cold and cause a blockage in the drainage ducts.
That said, having a cold and a blocked nasal cavity would make a nasal passage prone to irritation, which makes it more likely to swell up.
Children are much more likely to develop sinusitis from their allergies or exposure to foreign substances. Illnesses they catch from other kids could also cause sinusitis. Bottle drinking on their back and exposure to secondhand smoke should also be avoided.
For adults, prior infections, whether viral or bacterial, smoking or exposure to secondhand smoke could put you at risk.