When humans ingest food, food is chemically digested mainly in the stomach and small intestine, using a variety of digestive enzymes for chemical digestion, the products of decomposition are indole, fecal odorant molecules, ammonium sulfide, acetic acid, etc., which determines the taste of the stool becomes smelly, the main cause of odor is indole and fecal odorant substances. In addition, the stool is not born very smelly, the stool of infants is not particularly smelly, only after the gradual intake of a variety of human food, especially meat food intake, slowly the stool will become strange and unpleasant. The patient has obvious indigestion, and the stool will also tend to be particularly smelly. So usually try to be light in your diet, so that the stool is relatively less smelly.