General Facts:

  • appear in the mouth on soft movable tissues eg. the cheek, tongue and soft palate
  • look like small round shallow ulcers
  • usually have a white/grey centre and a round red halo around it
  • they are not contagious
  • will usually go away in a week
  • more prominent in women


Actual cause is unknown but may be triggered by the following

  • consumption of citrus fruits
  • physical trauma (toothbrushing, abrasive foods, dental braces)
  • stress
  • lack of sleep
  • sudden weight loss
  • food allergies
  • immune system reactions
  • deficiencies in vitamin B12, iron and folic acid