A colostomy is a surgery where an opening called stoma is created for the colon (large intestine) through the abdomen. In permanent (end) colostomy, the surgeon brings the end of the colon through the abdominal wall and turns it under like a cuff, and stitches the edges of the colon to the skin of the abdominal wall forming a stoma. The stool will drain from the stoma into a pouch or bag attached to the abdomen. Temporary loop colostomy involves cutting a hole in the side of the colon and stitching it to a corresponding hole in the wall of the abdomen. This can be reversed later.