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.
1 Swelling around the eye or the nose can be a later sign of sinus or nasal cavity cancer. Sometimes swelling will be seen on the roof of the mouth. 2  Eye symptoms. Double vision, persistent tearing, or bulging of the eye are all serious warning signs.  Lump in the neck.
According to Nader Sadeghi, MD, director of head and neck surgery at George Washington University in Washington, D.C, many symptoms of nasal cavity and paranasal sinus cancer are similar to those of the common cold.