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What Is Oral Thrush?

Oral thrush is a very common yeast infection in babies. It causes irritation in and around a baby's mouth.

What Are the Signs and Symptoms of Oral Thrush?

Oral thrush (also called oral candidiasis) can affect anyone, but is most common in babies younger than 6 months old and in older adults.

A baby with oral thrush might have cracked skin in the corners of the mouth or white patches on the lips, tongue, or inside the cheeks that look a little like cottage cheese but can't be wiped away.

Some babies may not feed well or are uncomfortable when sucking because their mouth feels sore, but many babies don't feel any pain or discomfort.