Mouth ulcers, also known as canker sores, are small, painful sores that can develop on the inside of the mouth. They are not contagious, but they can be very uncomfortable and can make eating and drinking difficult. There are a number of things that can trigger mouth ulcers, including stress, hormonal changes, certain foods, and vitamin deficiencies.
There is no cure for mouth ulcers, but there are a number of things that can be done to prevent them. These include: