What Causes Canker Sores?
8. Herpetiform Canker Sores
The third type of canker sore is known as herpetiform a canker sore. These are considerably less common than the other two are, and they are most likely to be found in older people. They have some quite significant differences to the other two varieties of canker sores.
Herpetiform canker sores are far smaller than the other types. However, they tend to occur in clusters of up to around 100 individual sores. In some instances, the small sores will merge together to form a single, larger sore. They will usually heal within around two weeks, and they will leave behind no scars.
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