Wafer barriers can help prevent irritation of the adhesive on the skin. However, they cannot stop the itching from a previous irritation. In fact, placing the barrier over the irritated skin can actually make it worse. The best thing to do to stop the itching is to apply an antifungal powder to clear up the skin irritation as quickly as possible. Once the skin has been restored, you can try using wafer barriers to prevent any further irritations.