Molds are fungi that can spread both inside and outside. No one knows how many species of fungi exist but estimates range from tens of thousands to perhaps three thousand or more. Molds grow best in warm, damp, and humid conditions. They spread and reproduce by making spores. Mold spores can survive harsh environmental conditions, such as dry places and places that do not support mold growth.

Some people are sensitive to mold growth. For those people, exposure to molds can cause symptoms such as nasal stuffiness, eye irritation, wheezing, and/or skin irritation. Some people, such as those with serious allergies to molds, may have more severe reactions. Severe reactions may occur among workers exposed to large amounts of molds in occupational settings, such as farmers working around moldy hay. Severe reactions may include fever and/or shortness of breath. Some people with chronic lung illnesses, such as obstructive lung disease, may develop mold infections in their lungs. Current evidence indicates that allergies are the type of diseases most often associated with molds.

Since the susceptibility of individuals can vary greatly either because of the amount or type of mold. If you are susceptible to mold and mold is seen or smelled, there is a potential health risk; therefore, no matter what type of mold is present, you should arrange for its removal.