Along with pollens from trees, grasses, and weeds, molds are an important cause of seasonal allergic rhinitis. People allergic to molds may have symptoms from spring to late fall. The mold season often peaks from July to late summer. It is these spores which trigger asthma and nasal symptoms in sensitive individuals, thus producing a mold allergy.
Molds are more prevalent in moist areas, such as costal and humid regions.
Mold spores tend to be released all year round and are found in both damp indoor and outdoor environments. Some people are sensitive to molds. For these people, exposure to molds can cause symptoms such as nasal stuffiness, eye irritation, or wheezing. Some people, such as those with serious allergies to molds, may have more severe reactions. Mold and mildew are fungi.