A convex ostomy appliance has a specially shaped barrier that creates a slight curve or “convex” shape. This design helps to press the skin around the stoma gently, which can be particularly useful for people whose stomas are flush with the skin or slightly recessed. The convex shape can help to create a better seal, prevent leaks, and improve overall wear time by ensuring the appliance adheres well and that output is directed away from the stoma. It’s often used when a flat appliance doesn’t provide a secure fit or when there are challenges with stoma placement or skin folds.