During surgery, the colon or part of the small intestine (ileum) is removed or cut. A small opening is made in the wall of the belly (abdomen). The end of the intestine is attached to this opening. The end of the intestine is folded like a small cuff. This is the stoma.
To make a stoma, the surgeon may use one end of the bowel, a loop of the bowel, or both ends of the bowel. Waste (stool and gas) then leaves the body through the stoma. It empties into a bag. You will be taught how to care for this.