Older patients with localized unexplained water in the anus accompanied by abdominal distension and pain, the first consideration may be caused by intestinal obstruction, and intestinal malignant tumors can not be excluded. Intestinal obstruction: due to the weakening of gastrointestinal function, older patients will have changes in bowel habits, or even have a long time without defecation or exhaust, thus causing different degrees of complete or incomplete intestinal obstruction. After the emergence of intestinal obstruction, due to the accumulation of fecal matter, the patient will have abdominal distension, defecation difficulties, and some fluids in the intestinal cavity will flow out of the anus along the edge of the fecal matter, which will lead to localized anus water or fecal water flow out of the anus. Meanwhile, during the acute attack of intestinal obstruction, patients will also have obvious severe abdominal pain, vomiting, nausea and no exhaust. Intestinal malignant tumor: when the malignant tumor of intestinal tract reaches the middle and late stage of tumor development and rupture, the patient will have abdominal distension and abdominal pain due to the stimulation of tumor rupture, at the same time, after the tumor rupture, there will also be blood or unexplained liquid out of the intestinal lumen, so that it will flow out of the anus along with the anal opening. At the age of 60, there may be other reasons for the anal flow and abdominal distension, so you should seek medical advice in time, and under the guidance of the doctor for examination and treatment.