Mold is a type of fungus that grows and proliferates in places with a very humid environment or in organic matter. Common causes of its growth are damage from floods or water seepage and excess condensation. Common places for mold to appear are roof and foundation leaks, high indoor humidity, overflowing washing machines, and more severe forms of flooding. Mold can be harmful to your health causing you to suffer from serious respiratory problems with symptoms such as nasal and sinus congestion, runny nose, respiratory problems such as wheezing and difficulty breathing, chest tightness, cough, throat irritation, and sneezing / sneezing fits.