When your body can't get rid of waste in the normal way, you may need an ostomy. This can happen because of a disease or a medical procedure. An ostomy is an opening that is created surgically somewhere on the body to help get rid of stool or urine. The waste is collected in a removable bag, called a pouch. The pouch is on the outside of the body and can be emptied as needed. Different kinds of ostomies are named for the organ involved. The most common types of ostomies in intestinal surgery are “ileostomy” (connecting the small intestine to the skin) and “colostomy” (connecting the large intestine to the skin). An ostomy may be temporary or permanent. All ostomies include a pouch and a wafer that helps protect the skin from irritation.