Sometimes a neonates breasts get swollen up in the days after birth under the influence of mothers hormones which get transmitted across the placenta. In some babies a small amount of milk might also be obtained on expression. This may happen in both male and female babies. This is a harmless condition that regresses spontaneously in a few days. It does not require any manual expression of milk or massage. In any case if it has been done, it is not going to harm your baby in any way.