MedlinePlus: Canker Sores
Benign, open sores in the soft tissues of the mouth that are also known as aphthous ulcers.
www.nlm.nih.gov/medlineplus/ency/article/000998.htm
Mouth Ulcers
Provides information, surveys, a message board, and more.
www.mouthulcers.org
Fever Blisters and Canker Sores
Describes the symptoms, treatment, and differences between these two common disorders of the mouth. From the National Institutes of Health.
www.pueblo.gsa.gov/cic_text/health/fever-blister/fever-canker.html
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