Oral thrush, also known as oral candidiasis, is a fungal infection caused by the overgrowth of Candida albicans on the mucous membranes of the mouth. This condition is characterized by creamy white lesions, often on the tongue or inner cheeks. Although it is not considered a toxicological condition per se, it can have implications in the field of toxicology, particularly concerning its causes and the effects of various substances on its development.