Increasingly thin stools are usually caused by narrowing of the intestinal tract. Bowel narrowing has the following aspects: 1, hemorrhoids. Including internal and external hemorrhoids, mixed hemorrhoids, anal fistula, perianal abscess and other anal diseases, as well as foreign bodies, polyps, benign and malignant tumors, when there is a tumor in the intestinal tract of tissue proliferation, not only appeared in the case of thinning of the stool, will also be blood, need to go to the hospital anorectal department to do anus fingerprinting, colonoscopy, routine stool examination to confirm the diagnosis, early discovery and early treatment.2, intestinal irritation syndrome, indigestion can also cause the thinning of the stool, mainly with the usual spicy and stimulating food, usually pay attention to light diet, drink water. Mainly with the usual like spicy stimulating food has a relationship, usually pay attention to a light diet, drink more water, eat more fresh fruits and vegetables, to promote smooth stools, but also appropriate supplement probiotics, regulating intestinal function, to see if it can be improved, if not improve the need to go to the hospital for further examination to confirm the diagnosis.