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From Mold Exposure. Sinus congestion, also referred to as sinusitis or a sinus infection, is one of many potential health effects of mold exposure. It causes the sinuses, or nasal passages, to become swollen and inflamed. This interferes with drainage, so you feel stuffed up.
Chronic sinusitis. Chronic sinusitis can be caused by an infection, growths in the sinuses (nasal polyps) or by a deviated septum. Signs and symptoms may include nasal obstruction or congestion that causes difficulty breathing through your nose, and pain and swelling around your eyes, cheeks, nose or forehead.