What most naturally follows?

How to treat thrush
Know what causes thrush.
Thrush, or oral candidiasis, is caused by an overgrowth of a type of fungus, or yeast, called candida albicans. Candida is a normal part of the body.
Candida albicans is naturally found throughout the gastrointestinal tract, including the mouth. Candida is also a normal resident of the skin.