Stinky stool is mainly due to the following reasons: First, constipation, due to the intestinal ganglion conduction block and intestinal disorders of the plant nervous system, so that the stool in the intestinal tract of the residence time is too long, too much water absorption, thus causing the stool dry, fecal ball-shaped performance. At this time, because the stool time is too long, so the discharge will occur more smelly phenomenon. Second, eating fried, barbecued and high-fat, high-fat, high-sugar food. Because the food residue contains more protein, sugar, bacterial decomposition produces more ammonia substances, thus making it produce a significant odor. Third, intestinal inflammation and intestinal tumors. In the intestinal tract has inflammation and intestinal tumors, due to incomplete digestion of food, bacterial fermentation produces substances containing amines, so it can also lead to more smelly stool.