Wiping away the plaques or pseudomembranes with a gauze sponge leaves a painful erythematous, eroded, or ulcerated surface. Although lesions of thrush may develop at any location, favored sites include the buccal mucosa and mucobuccal folds, the oropharynx, and the lateral aspects of the tongue. In most instances in which the pseudomembrane has not been disturbed,associated symptoms are minimal. In severe cases,patients may complain of tenderness, burning, and dysphagia.