Baby poops

Hi mommies , i have a serious question and i hope to get an answer. Isit normal that everytime after milk 30mins or early later your child pooped (loose stools) .. I realise that everytime after his milk he pooped & recently he has rashes around his yknow . I applied cream but I’m worried about this . I did a research on google but i prefer if some expert mommies who knows about this and what should i do ? :/ isit milk problem or something ??? #pleasehelp #worryingmom