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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.
You may initially mistake your mold allergies for a cold or sinus infection, since the symptoms can mirror each other. If your allergies are compounded by asthma, you may notice your asthma symptoms worsening when youâre exposed to mold. Symptoms include coughing, difficulty breathing, and chest tightness. You also may experience wheezing and other signs of an asthma attack.