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Thrush and the Newborn
Oral thrush, also known as candidiasis, is a fungal or yeast infection that can occur in newborns and in people with weakened immune systems. Oral thrush is caused by an overgrowth of a fungus called Candida, which is normally found on the skin or in mucous membranes, according to the Centers for Disease Control and Prevention. Symptoms of thrush include cracks in the corners of the mouth and white or yellow raised areas on the lips, tongue and palate.