Radon comes from the radioactive breakdown of naturally occurring radium found in most Florida soils, and in most earthen material used in the building process. In the vast majority of buildings with radon problems, the largest source of radon is soil gas entering the building through small openings in the foundation.
Symptoms of nasal cavity cancer and paranasal sinus cancer include chronic congestion, recurring infections of the sinuses, headaches and recurring nosebleeds, according to Cancer.net.
Back to Top Symptoms. If you have small polyps, you may not have any symptoms. If polyps block nasal passages, a sinus infection can develop. Symptoms include: 1  Runny nose. 2  Stuffed up nose. 3  Sneezing. 4  Feeling like your nose is blocked. 5  Loss of smell. 6  Loss of taste. 7  Headache and pain if you also have a sinus infection.