Mold and yeast are two types of fungus. Both can cause allergic reactions. Fungal spores can circulate in the air and may cause allergic rhinitis when inhaled.
Review Date 10/24/2016
Updated by: David L. Swanson, MD, Vice Chair of Medical Dermatology, Associate Professor of Dermatology, Mayo Medical School, Scottsdale, AZ. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.