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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.
Back to Top Symptoms. If you have small polyps, you may not have any symptoms. If polyps block nasal passages, a sinus infection can develop. Symptoms include: 1  Runny nose. 2  Stuffed up nose. 3  Sneezing. 4  Feeling like your nose is blocked. 5  Loss of smell. 6  Loss of taste. 7  Headache and pain if you also have a sinus infection.