The gas expelled from the body’s intestinal tract is commonly known as farting, and there are several possible reasons for the body’s especially foul-smelling exhaust: First, it may be due to eating foods that cause foul exhaust, such as garlic, stinky tofu, soy products and other foods that cause especially foul exhaust; Second, especially foul exhaust may also be due to some gastrointestinal diseases, especially diseases of the colon system, such as ulcerative colitis, intestinal tuberculosis, acute and chronic Enteritis, bacterial dysentery, Crohn’s disease, colon polyps, colon cancer, these diseases may lead to impaired absorption of food residues to the colon, or excessive secretion of ammonia and thus cause the intestinal exhaust especially smelly. In conclusion, the odorous intestinal gas may be a normal physiological condition, or it may be due to some intestinal system diseases.