Some mouths are susceptible to ulcers and this can be exacerbated by tissue irritation from braces. While this is not an emergency, ulcers can be very uncomfortable. If there is a point of irritation, covering that spot with wax can ease the discomfort and allow healing to occur. A warm salt water mouthwash will provide temporary relief and ensure the ulcer does not become infected (mix one teaspoon of salt in a glass of warm water and rinse for 30 seconds). A small amount of topical oral anaesthetic paste (available from pharmacies) applied to the surface with a cotton bud may offer some relief. Orabase (also available from pharmacies) can help ulcers to heal by providing a protective layer.