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.
Sinus headaches typically have the following symptoms: 1  Pressure-like pain in one specific area of your face or head (for example, behind your eyes). 2  Face is tender to the touch. 3  Pain is worse with sudden movements of the head and bending forward.