Abstract: A stomal stop has a support which is substantially circular in cross section, one end of which is configured to be received within a stoma. The oppositely situated ends of the support are open such that material may pass therethrough. A bag is at least partially surrounded by the support such that material entering the stomal channel from said stoma is substantially deposited within the bag. A material which expands through the action of heat, fluid, or pressure is formed at least partly around the support for attaching the support to the stoma. A fluid-absorbing spongy material substantially surrounds at least a portion of the support and expands upon absorption of fluid to seal the stoma. A helical spring may optionally be disposed within the support body and tensioned by an insertion sleeve to permit passage of the support body into the stoma. Upon removal of the insertion sleeve the helical spring resiliently expands to frictionally hold the stomal channel within the stoma.