Bowel cancer can cause abdominal distension, which is usually caused by intestinal dysfunction or intestinal obstruction. 1. Bowel dysfunction: Due to the stimulation of bowel by cancer, it leads to bowel dysfunction, which sometimes causes frequent bowel movements, abdominal distension and abdominal pain. It usually concentrates in the middle and lower abdomen, mostly hidden pain or distending pain, and will tend to aggravate. 2. Intestinal obstruction: if the intestinal tumor grows to a certain degree, the larger tumor will block the intestinal lumen, thus leading to obstruction of intestinal tract caused by intestinal contents not being able to pass through, and then abdominal pain, abdominal distension, and cessation of anal defecation and bowel movement will occur. Bowel cancer patients are recommended to have a diversified diet, eat more protein and vitamin-rich food, avoid too rough, smoky, fried and stimulating food. When bowel cancer causes abdominal distension, it is necessary to go to the hospital in time, do relevant examination, clarify the cause of the disease, and actively treat it under the doctor’s guidance.