What explanation do you find to this?! The baby starts eating when I f…

What explanation do you find to this?! The baby starts eating when I feed it in a cradle position, burps and starts crying. Or sometimes it just cries, and naturally throws its chest. I find an explanation that some processes occur in the intestines immediately after giving breast milk. But why is that? And can someone have this problem? Someone has studied this question? But what's important is that he starts worrying about his stomach is 100%.