There are a few ways babies can get oral thrush. Babies can also get a yeast diaper rash when their diaper area is too hot ...

Oral thrush, also known as oral candidiasis, is a yeast infection of the mouth caused by an overgrowth of the Candida fungus.

They should not be used on a baby younger than four weeks old. Oral thrush is most commonly treated with a prescription oral antifungal drop that is applied to the sides of the infant's mouth.