Generally speaking, low stool volume and diarrhea may be caused by physiological factors such as eating too much cold food and pathological factors such as bacterial dysentery. 1. Physiological factors: eating too little, eating too much cold food such as ice cream, etc., can cause low stool volume and diarrhea and other symptoms. 2. Pathological factors: (1) intestinal polyps: due to chronic inflammatory stimulation, heredity and other factors caused by the intestinal mucosal surface protruding intestinal lumen of the bulging lesions. Patients with intestinal polyps mostly have no obvious symptoms, and a few of them can be manifested as abdominal discomfort, abdominal distension, low and unshaped stools and other changes in stool characteristics, blood in the stool, and so on. (2) Ulcerative colitis: it is a kind of chronic non-specific intestinal inflammation, mainly involving the rectum and colon, which can manifest as chronic or subacute diarrhea, mucous pus and blood stool and abdominal pain. (3) Intestinal tumors: they can be divided into benign and malignant tumors. Benign tumors can be asymptomatic or with mild symptoms, while malignant tumors can manifest as abdominal pain, abdominal distension, emaciation, blood in stool, diarrhea and change of stool properties. There are many other causes of low stool volume and diarrhea, such as intestinal obstruction, etc. It is recommended to consult a doctor in time to clarify the diagnosis and carry out targeted treatment.