Canker Sores vs. Cold Sores: what's the difference?
Canker sores (or called apthous ulcers) are a shallow lesion that develops inside the mouth on soft tissues, such as the cheeks, below the gums, inside of the lip, under the tongue or on the tongue. They look like a small white or yellow circle with a red border. They can burn or cause discomfort when you eat, drink or even when you brush your teeth. Canker sores do not occur on the outer surface of the lips and are NOT contagious. They are quite common and the exact cause is unknown, but they are not known to be a viral nor a bacterial infection.
Possible triggers are:
stress, acidic foods,
trauma such as biting the cheek, sports injury or brushing too hard,
ingredients in mouth products such as sodium lauryl sulfate,
diet lacking in vitamin B12, zinc, folate (folic acid) or iron,
hormonal shifts during menstruation
Most of the ulcers resolve on their own in 2 weeks. Applying a topical numbing gel can help with discomfort for children that are old enough for it. It is recommended to avoid spicy or acidic foods while the healing is in progress. Use a soft bristled toothbrush when brushing the teeth twice daily. Avoid toothpastes and mouth rinses that contain sodium lauryl sulfate.
