Acne infantum also known as toddler acne, acne infantilis, infantile acne, acne juvenilis. Baby acne are small bumps (whiteheads and pimples) on an infant’s skin. These bumps are usually closed, but open, inflamed or rash-like eruptions can also appear. Acne usually arises within the first few weeks of life and generally resolves within a couple of months. Babies normally get acne on their cheeks, but baby acne can also occur on the nose, forehead, chin, neck, arms and back.