Small stools that are difficult to pass are usually caused by gastrointestinal dysfunction, hemorrhoids, or occupational lesions of the anus. Patients need to go to the hospital in time to improve the relevant examination to identify the specific causes before treatment. Common causes and treatment methods 1, gastrointestinal dysfunction: can be due to dysbiosis leading to gastrointestinal tract dysfunction, causing thin stools. Patients can be under the guidance of a professional doctor, oral gastrodynamic drugs for treatment, and avoid spicy, irritating food, such as chili, pepper, etc., but also need to quit smoking, alcohol, and appropriate physical exercise; 2, hemorrhoids: in defecation can appear foreign body feeling, defecation does not feel, and small, unshaped stool. The hemorrhoids can be treated with topical hemorrhoid creams and other medications under the guidance of professional doctors, and if necessary, surgical removal of the hemorrhoid site to achieve the purpose of treatment; 3, the anorectal area occupying lesions: such as anorectal polyps, intestinal tumors, anorectal polyps can have abdominal pain, body wasting, poor and other symptoms, and small stools, the general effect of surgical removal is better. Intestinal tumors, such as rectal cancer, can also cause abnormally thin stools, often accompanied by bloody stools, pain in the left lower abdomen, and palpable left lower abdominal mass. Late stage rectal cancer may also cause intestinal obstruction, which patients need to pay attention to. Patients need to pay attention to it. Generally, they can choose appropriate treatment methods under the guidance of professional doctors, such as endoscopic treatment and surgical resection treatment.