Ostomy drainage can be major trouble for people with ostomies. Ostomy drainage can get under the pouch seal and lead to drainage outside of the ostomy. This can cause infection and other problems. There are some ways to prevent this, but one of the most common is to use barrier rings. Barrier rings are small pieces of plastic that go around the outside of the pouch. They help to keep the ostomy drainage from getting under the seal and into the body.