Oral thrush is characterized by ulcers or lesions in the mouth caused by the yeast fungus Candida albicans. The lesions are painful, slightly raised, whitish in appearance, and cause a dry mouth.
Review Date 2/2/2023
Updated by: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.