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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.
Although difficult to predict, exposure to molds growing indoors is most often associated with the following allergy symptoms: 1  Nasal and sinus congestion. 2  Cough/sore throat. 3  Chest tightness. 4  Dyspnea (breathing difficulty). 5  Asthma (or exacerbation of it). 6  Epistaxis (nosebleed). 7  Upper respiratory tract infections. 8  Headache.either condition proves that mold is NOT a cause. In any case, molds growth in the indoor environment should be considered unacceptable from the perspectives of potential adverse health effects and building performance.