Canker sores, also known as aphthous ulcers, are annoying irritations inside the mouth that afflict as many as 20% of Americans. They are different from cold sores, which usually appear on the outside of the mouth on the lips.
Canker sores appear most commonly in adolescents and young adults. They are also more likely to appear around a women’s menstrual period, and there is a greater likelihood of having canker sores if a parent does. Often, canker sores occur during times of stress.
Traumatic ulcers, which look like canker sores, are caused by rough dentures, a slip of the toothbrush, or hot food.
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Archived: March 20, 2014
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