Abstract The causes of stomal difficulties may be psychologic, mechanical, physiologic, or anatomic. Operative correction was required in less than 10 per cent of cases. The principal conditions requiring operative correction of colostomy stomas were stenosis and herniation. The most common complications of ileostomy requiring revision were stenosis, prolapse, and interfering abdominal contours. A variety of surgical technics are available for prevention and correction of stomal difficulties caused by anatomic imperfections.