A aphte (ancient Greek ἄφθη / áphthê, ἄπτω / áptô, burn) is a superficial ulceration of the mouth or other body.

Canker sores are most often in a healthy, in isolation, and heal spontaneously. They are frequent injuries to the unknown etiology. Their occurrence may be related to nutritional factors, psychological (especially stress) or hygienic. In particular, the consumption of cooked tomatoes, walnuts and gruyère or chocolate and all food allergens promotes their appearance. In the long term, using a toothpaste containing sodium lauryl sulfate can cause in some people the appearance of mouth ulcers.

When oral ulcers are not isolated and are accompanied by other symptoms, it can find itself in the context of a Behçet's disease or inflammatory bowel disease such as ulcerative colitis and Crohn's disease.

Spontaneous Healing is within 8 to 10 days in hygienic conditions normal. If a aphte has not disappeared two weeks after its appearance, or if others have emerged during this time should consult a dentist or more generally a ORL.

Contexts appearances
There are lesions resembling canker sores in the following cases:

* Certain viral infections such as infectious mononucleosis, papillomavirus, HIV, chickenpox and shingles;
* Certain bacterial infections;
* Fungal;
* Certain cancers such as lymphoma or leukemia;
* Some vitamin deficits;
* As a result of trauma premises as at the touch of the mucosa with a denture;
* As a result of radiotherapy in brain or neck;
* As a result of beatings.
* As a result of biting mouthparts

The presence of several sores, genital or oral, is called aphtose.

Prolonged use of certain drugs, such as pellets against sore throat, can cause an imbalance in the mouth flora and cause sores.

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