Wash the affected area once a day with mild baby soap or coconut-based soap and lukewarm water; pat dry gently. Do not use hot water on the baby's skin. Baby acne is irritated by heat and saliva, so it can flare up when the baby is hot and fussy. The condition is also irritated by detergents, so watch for additional irritation. Avoid scrubbing and using very coarse cloths. Use a washcloth with soft fibers.
Avoid use of baby oils or oily lotions on the affected area. Some lotions such as Aveeno or Cetaphil have been reported to help baby acne. When using a new product, closely watch the area and make sure the skin is not irritated further. Avoid the use of any over-the-counter acne products. These are meant for teens and adults and are very harsh on a baby's tender skin.
Seek the advice of your pediatrician if your baby's acne appears severe or bothersome.