Slide show: Common baby rashes
Photo of baby yeast infection
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A yeast infection is a persistent, bright red rash on a baby's bottom or other areas where skin touches skin. You might notice small red bumps on the outer edge of the rash. A yeast infection can also develop in a baby's mouth. This type of infection, known as thrush, appears as creamy white sores in the mouth.

Yeast infections are caused by a microorganism that flourishes in a warm, moist environment. Babies who've recently taken antibiotics might be more likely to develop a yeast infection.

If you suspect that your baby has a yeast infection, consult your baby's doctor. Prescription antifungal medication might be needed.

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