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You are seeing a 3 day old infant with a new onset rash on the chest and abdomen. The baby was born full-term with no complications and went home yesterday. Mom has been exclusively breastfeeding every 1-2 hours, and ate a bag of peanuts several hours before noticing the baby’s rash. The baby has no fever and is eating and urinating well. There is no history of maternal infections.

Which of the following is appropriate management?