Before penning down on mold allergy symptoms, causes and its treatment, let’s make the idea clear in our mind on molds. The mold actually is a kind of fungus (aka hyphae, mildew and mycelium), causing the organic matters to rot or decay. Coming into existence in a form of multi-cellular filament, the molds deprive the organic matters of its liveliness. Categorized for study as Zygomycota, Deuteromycota and Ascomycota there are different types of molds who establish theirs identity either as the useful molds or perilous fungi or mildews affecting the people with mold allergy or yeast infection. Although all the molds spoil the foods and cause allergy, there are still some molds or mildews who play a crucial role in the manufacture of variety of food products, beverages, medicines and enzymes. It is allergic reaction of mold which causes many health complications to the humans, known as symptoms of mold allergy, calling for better hygienic environment. There is legion of mold species or genus that are supported by some unfavorable fungi or mildews, such as pathogens, saprotrophs, aquatic species and thermophiles. The molds survive basically on organic matters or over the regions which they exploit as a material, known as hydrolytic enzyme. The molds degrade or spoil complex organic molecules, such as starch, cellulose and lignin turning them into simple material. It is an exceptional process or recycling of some crucial substances by the molds which exposes the molds as a most conspicuous fungi.