Oral thrush in babies is a type of yeast infection that typically appears as white or yellow irregularly shaped patches or sores that coat your baby's mouth. Thrush often appears on the gums, tongue, roof of the mouth and/or insides of the cheeks. Oral thrush is a common infection in babies, but you can help prevent it: If you formula-feed your baby or use a pacifier, thoroughly clean the nipples and pacifiers in hot water or a dishwasher after each use. That way, if there's yeast on the bottle

Causes and symptoms of oral thrush

Oral thrush: Causes, Symptoms, Treatment | Oral thrush contagious