Neonatal acne looks similar to teenage acne. white or red bumps or pimples, surrounded by reddish skin. Acne usually appears on the cheeks and sometimes on the forehead, the chin, and even the back. It can become more pronounced when your baby is hot or fussy, or if his skin is irritated by saliva, spit-up milk, or fabric that′s a little rough or has been washed in strong laundry detergent. Tiny white bumps that are there at birth and disappear within a few weeks are called milia, and they′re not related to acne. If the irritation looks more rashy or scaly than pimply, or it appears elsewhere on your baby′s body, he may have another condition, such as cradle.