Canker sores, also called aphthous ulcers, are small, shallow lesions that develop on the soft tissues in your mouth or at the base of your gums. Unlike cold sores, canker sores don't occur on the surface of your lips and they aren't contagious.
Can aphthous ulcer occur on hard palate?
Canker sores (also called aphthous ulcers) are different than fever blisters. They are small, red or white shallow ulcers occurring on the tongue, soft palate or inside the lips and cheeks; they do not occur in the roof of the mouth or the gums.
What are aphthous ulcers associated with?
Various factors have been suggested to precipitate recurrent aphthous ulcers including:
- Oral trauma.
- Anxiety or stress.
- Certain foods (including chocolate, coffee, peanuts, and gluten-containing products).
- Stopping smoking.
- Hormonal changes related to the menstrual cycle.
