Intestinal peristalsis produces gas

Because the intestine has been crawling, as long as the peristalsis exists, gas will be discharged from the anus and fart.

Food is digested to produce gas.

Due to the normal flora in the digestive tract, people will produce more gas when eating. These gases move downward with the peristalsis of the intestine and are discharged from the anus.

Farting is a sign of the normal operation of the intestine.

Farting is a manifestation of the normal operation of the intestine. On the contrary, if you don't fart, or fart too much and stink, that's an abnormal phenomenon.