Mouth ulcers can be very uncomfortable and look like small blisters caused by your tooth rubbing, a lack of vitamin B12, anaemia or even stress. 

Treatment is simple and they usually heal within a week. Should they last for more than two weeks however, you should visit your dentist as this may lead to something more serious.

Treatments available such as antiseptic mouthwash are available from reception or your local chemist.One of the best ways to prevent mouth ulcers is a healthy balanced diet.