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Canker sores are shallow, agonized sores in the mouth. They are commonly red or haw sometimes have a albescent coating over them. You might get them on the exclusive of your lips, the insides of your cheeks, the base of your gums or under your tongue. Canker sores are different from fever blisters, which commonly are on the outside of your lips or the corners of your mouth.
Anyone can get canker sores, but women and people in their teens and 20s get them more often. Canker sores haw run in families, but they aren't contagious. Doctors don't know what causes canker sores, but they haw be triggered by stress, poor nutrition, food allergies and menstrual periods.
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