Cheack this out moms?

-My baby is amonth an he was lil grumpy I didnt now what to do an my boyfriends dad told me to put breastmilk on his back an some black lil things will come out at first I was like na his crazy .but I think about it said is not going to harm my baby is my milk so I did it an started put in on his back is crazy but is true some black lil thing came out now his not grumpy ..trust me will sound crazy but trueCool