Instructed patient in some cases of colostomy, skin irritation or infection can result from stool that leaks under the bag. A hernia can develop around a colostomy, and the bowel may become narrow. Taking good care of your stoma and eating a balanced diet can help you avoid these problems. Pouching systems are waterproof. However, you may feel more secure if you wear an ostomy belt or put tape around the edges of your skin barrier when you are in the water.