The common causes of normal but small stools include dietary problems, hemorrhoids, intestinal polyps and intestinal tumors, which need to be treated according to the causes, such as dietary changes, medication and surgery. 1. Dietary habits: The thickness of stools may be related to dietary habits, such as frequent consumption of coarse fiber food, stools are easy to form, and may show a thicker shape; if you eat fine food, stools are finer. Regardless of the thickness of the stool, but not accompanied by other symptoms of discomfort, may not be special treatment. 2. Hemorrhoids: normal stools just become thin and accompanied by pain in defecation, bleeding, etc., may be caused by hemorrhoids, through observation of the perianal or anoscopy to confirm the diagnosis. Can be used externally medication such as hemorrhoid cream, and then with 1:5000 potassium permanganate warm water sitz bath. Hemorrhoids seriously affect the life of people can consider surgical treatment. 3. Intestinal polyps: due to occupying the intestinal volume, they can squeeze the stool to make the stool thinner, confirmed by proctoscopy, and then endoscopic resection or minimally invasive surgical treatment is given. 4. Intestinal tumors: obvious space occupation caused by tumors may block the intestinal lumen and cause narrowing of the digestive tract, resulting in thinning of stools. Biopsy can be taken from the suspicious area under proctoscope and sent to pathological examination to confirm the diagnosis, and radiotherapy or surgery can be given after the lesion is clearly identified. If you have normal but small stools every day, there may be other reasons, so you should go to the hospital and do relevant examinations to identify the cause and guide the treatment. You should go to the hospital and do relevant examinations to clarify the cause of the disease, and give different treatments according to different causes of the disease.