[Practical! How to prevent and treat oral ulcers] Expert introduction: Local trauma, malnutrition, changes in hormone levels, and mental stress may lead to oral ulcers. #How to quickly relieve mouth ulcers#? (1) Daily care: pay attention to oral hygiene, maintain adequate sleep, and do appropriate physical exercise; (2) Diet or drug conditioning: eat more vegetables and fruits rich in VB and VC, and avoid spicy, greasy, high-sugar and high-oil foods.