Intussusception is a serious condition that occurs as a result of part of the intestine sliding into an adjacent part of the intestine. When this happens, the intestine becomes blocked and food and fluids are unable to pass through. Intussusception also causes the intestine that the condition is affecting to be cut off from its normal blood supply. This condition can result in a tear in the bowel (also known as perforation). It can also result in an infection and death of bowel tissue.