It could be heat rash/milk rash or the pre stage rashes for newborn baby. You can use damp cloth to clean her face each time after BM and pat dry after that. It will go away after awhile. Unless baby feel discomfort and itchy/dry/blisters then you may consult dr. I will use either Kodomo Powder Lotion or Cetaphil Lotion after each bathing period or when skin gets dry/too red.