Stool thinning always easy to fart, may be intestinal polyps, enteritis, intestinal cancer, constipation and other diseases caused by. 1. Intestinal polyps: most of the smaller polyps do not have obvious changes, but when the polyps are larger, they can obstruct defecation, and obstructing defecation can lead to the gathering of feces, which can easily lead to bacterial growth, and bacterial growth can lead to an increase in the amount of gas production, and thus can lead to the phenomenon of thinning of the stools and an increase in the number of farts. 2. Enteritis: mostly accompanied by inflammation and infection, bacterial growth and food fermentation can easily lead to increased gas production, so the phenomenon of increased farting can occur. 3. Intestinal cancer: as the tumor usually protrudes into the intestinal lumen, the tumor will block the discharge of feces, which can lead to the phenomenon of thinning of stools, and most of them are accompanied by inflammation and infection, which can lead to bacterial growth and increase in the amount of gas production, and therefore, there can be an increase in the amount of farting. 4. Constipation: Constipation can also cause thinning of stools and easy farting. It is recommended to go to the hospital in time for colonoscopy and other examinations to further determine the cause of the disease.