Canker sores are small, painful reddish lesions in the mouth that have a white or yellow center. Some causes of canker sores are spicy/acidic foods, vitamin deficiencies, braces, and stress.

A mouth sore is enough to make your appetite ... How are canker sores and cold sores different? Cold sores are contagious.

Canker sores, which occur inside the mouth, are not contagious or caused by a virus. They are different from cold sores, ...

A check mark. It indicates that the relevant content has been reviewed and verified by an expert Our stories are reviewed by medical professionals to ensure you get the most accurate and useful ...

These come in different preparations so you should ask your GP or a dentist which ones are safe to use. Fortunately, most mouth ulcers should heal by themselves within a week, but if you have a ...