Sometimes part of the bowel has to be surgically removed or bypassed, which means that bowel movements (stools) can no longer pass out of the body through the anus. The surgeon creates a new opening through the skin of the tummy (abdominal) wall and attaches part of the remaining bowel to the inside.
This is a companion discussion topic for the original article at https://patient.info/digestive-health/inflammatory-bowel-disease/stoma-dietary-care