The exact cause of mouth ulcers is still not known and varies from person-to-person. Still, there are some common causes and several factors that may aggravate mouth ulcers, including the following:
- quitting smoking
- citrus fruits and other foods high in acidity or spice
- biting the tongue or inside of the cheek
- braces, poor-fitting dentures, and other apparatus that may rub against the mouth and gums
- a deficient filling
- stress or anxiety
- hormonal changes during pregnancy, puberty, and menopause
- medications including beta-blockers and pain killers
- genetic factors
Some people may develop ulcers as a result of a different medical condition or a nutritional deficiency.
Conditions such as celiac or Crohn’s disease, vitamin B12 or iron deficiency, or a weakened immune system may all trigger ulcers to form.
