Bloating and inability to pass stool may be related to functional constipation, intestinal obstruction, colorectal tumor and other diseases. 1. Functional constipation: mainly manifested as a decrease in the number of bowel movements and defecation difficulties, patients may have abdominal distension, stools can not be discharged. It is related to old age, poor living habits, psychological disorders (depression, anxiety, obsessive-compulsive disorder and other psychological disorders) and so on. 2. Intestinal obstruction: manifested as abdominal pain, abdominal distension, nausea and vomiting, stop defecation and gas evacuation, etc. Abdominal distension and inability to pass stool can be considered as incomplete intestinal obstruction, which is mostly caused by intestinal adhesion, intussusception and other reasons. 3. Colorectal tumor: the mass of colorectal tumor usually protrudes into the intestinal lumen and grows, when it grows to a certain extent, it can block the intestinal lumen, leading to the phenomenon of poor defecation, which is manifested as abdominal distension, inability to pass stool and other symptoms. Bloating and bowel movement may also be related to other diseases, such as inflammatory bowel disease, hernia, rectal prolapse, and so on. It is recommended to make a clear diagnosis under the guidance of a professional physician through colonoscopy, rectal diagnosis and other examinations.