Thrush in the mouth (oral candidiasis) is a fungal infection that causes white patches on the inside of the cheeks, roof of the mouth, tongue, and throat lining that can be painful. Oral thrush is ...

Medically reviewed by Edmund Khoo, DDS Thrush, or oral candidiasis, is a fungal infection in your mouth and throat. It is caused by an overgrowth of yeast called Candida albicans. Candida is normally ...

Oral Thrush This happens when an overgrowth of Candida fungus accumulates in the mouth. This can cause creamy white or yellow spots to appear on the gums, cheeks, tongue, or roof of your mouth.