Bowel obstruction refers to a blockage in the small or large intestine. It prevents food, fluids and gasses from moving through the intestine normally.
A bowel obstruction can be the result of tumors, scar tissue or a constriction of the intestines. In the small intestine, scar tissue is the most usual cause. In the large intestine, cancer is the most usual cause. Other causes are severe constipation and constriction to the intestines caused by diverticulitis or IBD (inflammatory bowel disease).