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.
Signs and symptoms of sinus headaches â regardless of cause â may include: 1  Pain, pressure and fullness in your cheeks, brow or forehead. 2  Worsening pain if you bend forward or lie down. 3  Stuffy nose. 4  Fatigue. Achy feeling in your upper teeth.