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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.
The initial symptoms of a sinus infection are a green or yellow mucus discharge from your nose, accompanied by facial, often severe, pain around your cheeks, eyes or forehead. A viral infection is the most common cause of sinusitis.