Many white-collar workers in the Office have the habit of snacking. First, to meet the needs of their own snacks, and the other is to ease the pressure of work. But accidentally, you may suffer from oral ulcers.Food into the mouth, need of the oral mucosa to produce the keratinized layer, and the small glands secrete a protective layer of mucus protein, plays a role in lubrication. Food in the mouth during chewing, we should consume this protective layer, and with access to the esophagus. However, if such consumption is greater than the capacity of glandular secretion, the oral mucosa wills loss the protection layer, directly with the food “face-to-face” o. In this case, the oral mucosa is easily damaged under friction. Generally speaking the more rough-drying of food more easily lead to ulcers.