Mold is a fungus that thrives on moisture and produces spores that travel through the air. Molds can grow on clothes, paper, ceilings, walls & floors of your house. When you inhale these spores with the air, you can develop allergy and suffer from stuffy nose, itchy throat, mouth & eyes, dry skin and coughing. You are at risk if you live in a house with poor ventilation, high humidity and have a family history of allergies.