Anyone can develop canker sores, but these factors make you more susceptible:

  • Being female. Canker sores, especially clusters of small sores, are more common in women.
  • Having a family history. About one-third of people with recurrent canker sores have a family history of the disorder. This may be due to heredity or to a shared factor in the environment, such as certain foods or allergens.
Mar. 24, 2012

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