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 8/26/2017
Updated by: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.