What should you do about infant acne?

NO treat infant acne. Infant acne is self-limiting (resolves on its own) and does not bother the child so no treatment is necessary.
Infant acne. Infantile acne almost always requires no treatment. And in those rare cases where treatment is necessary it usually responds to all the typical acne medicines.
Depends on situation. The typical infant acne comes on within a few weeks of birth and fades by 3 months without any treatment. It reflects maternal pregnancy hormones. If or when it comes up later or stays into 4 or 5 months, the pediatrician may recommend treatments, as they may be needed to prevent scaring. Acne in the older infant or toddler must be viewed as a different process and a cause determined.