Mouth ulcers, also known as canker sores, are usually small, painful lesions that develop in the mouth or at the base of the gums. They can be extremely uncomfortable and painful while eating, drinking and talking. There is no exact cause behind mouth ulcers, but certain factors are known to trigger them, including:
- Minor mouth injury
- Toothpastes and mouth rinses that contain sodium lauryl sulfate
- Sensitivities to acidic foods such as citrus fruits or juices
- Lack of essential vitamins, especially B12, zinc, folate and iron
- Allergic response to mouth bacteria
- Dental braces
- Hormonal changes during menstruation
- Emotional stress or lack of sleep
- Bacterial, viral or fungal infections
Types of Canker Sores
There are three types of canker sores: minor, major and herpetiform. These different types are associated with several distinguishing symptoms.- Minor - Minor canker sores are small, oval or round ulcers that heal within 1-2 weeks without scarring. This is the most common type of canker sore.
- Major - Major canker sores are larger and deeper than minor sores. They have irregular edges and can take up to six weeks to heal, resulting in long-term scarring.
- Herpetiform - Herpetiform canker sores are pinpoint size and they occur in clusters of 10-100. This type of mouth ulcer has irregular edges and will often heal without scarring within 1-2 weeks. You should see a doctor if you experience this type of canker sore, as it can be very painful and is formed as the result of an infection of herpes simplex.