Canker Sores Directory
Canker sores are small, painful ulcers in the mouth. There are two types: primary and complex. Canker sores may be caused by stress, injury, irritating foods, nutritional problems, and an impaired immune system, among other things. Most heal without treatment, but extremely painful ones may warrant a prescription treatment. Follow the links below to find WebMD's comprehensive coverage about how canker sores are contracted, what they look like, how to treat them, and much more.
Medical Reference
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Learn More About Canker Sores
Canker sores appear in the mouth and can be painful. Learn more about causes, symptoms, and treatment.
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Canker Sore Symptoms
WebMD explains the symptoms of canker sores and factors that raise the risk of getting them.
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The Basics of Canker Sores
WebMD explains canker sores, mouth ulcers that may be caused by anything from hot foods to hormones.
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Treating Canker Sores
Learn how to treat canker sores from experts at WebMD.
Video
Slideshows & Images
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Slideshow: Top Problems in Your Mouth
Sores, painful gums, bad breath -- what’s going on in your mouth? Found out with our slideshow of the most common mouth problems.
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Slideshow: The Science Behind Weird Body Quirks
Who hasn't had an ice cream brain freeze, or been awakened by the pain of a charley horse? What's behind these weird body quirks, anyway? Find out.