Is there a proven relationship between stress and canker sores?

Scientific studies led to this day show contradictory results on a correlation between stress and canker sores. However, many people recall stress as the first reason of their canker sores. This link sometimes creates a vicious circle by which stress creates canker sores that increase stress, etc…

aftazen: canker sore treatment discover our study on canker sores
Many women have canker sores in the days before their menstrual cycle

Tip of the day:

Check that your toothpaste doesn't contain a substance likely to cause canker sores