The phenomenon of non-stop bowel movement in patients with terminal cancer usually includes gastrointestinal dysfunction, increased intestinal contents, secondary intestinal infections, drug side effects and other reasons: 1. Gastrointestinal dysfunction: most of the patients with terminal cancer are combined with more serious gastrointestinal dysfunction. If the peristalsis of gastrointestinal tract is obviously accelerated or irregular, patients will have more bowel movements or even diarrhea. Sometimes patients will have bowel movement more than ten times to twenty times in one night, which will lead to water and electrolyte balance imbalance and jeopardize patients’ lives; 2. Increase in intestinal contents: patients with advanced stage of cancer, the intestinal absorption function of water is obviously weakened. The exudate in the intestinal lumen will increase significantly, and the intestinal contents will affect and stimulate the intestinal function, aggravate the burden of the intestines, and lead to non-stop defecation of the patient; 3. Secondary intestinal infections: patients with advanced cancer usually combine with low immune function, especially patients with critical disease, and their immunity is extremely low. At this time, it is easy to secondary intestinal infection, thus causing infectious diarrhea. A large number of leukocytes can be seen in routine stool, and bacterial culture can find pathogenic bacteria in stool, and drug sensitivity test can guide the follow-up treatment of infectious diarrhea; 4. Drug side effects: it may be due to the adverse reaction of drugs in anti-tumor treatment, which leads to non-stop defecation. There are also patients with constipation after chemotherapy, if the application of laxative drugs, the dosage is not appropriate can also appear increased stool frequency, diarrhea and so on. When the patients with terminal cancer do not stop defecating, it is necessary to actively maintain the balance of water and electrolytes to avoid hypovolemic shock and ionic disorders.