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      20-year-old Miss Zhao recently felt pain in the mouth, chewing inconvenience. She came to the hospital for treatment, the doctor found her lips and mouth there are multiple ulcers.
      The doctor learned that Miss Zhao in order to maintain a slim figure, to prevent fat, long time to eat deliberately do not eat. But after all eating too little, hungry, very uncomfortable, so she often eat melon seeds, potato chips like snacks to eat, and rarely drink water. Did not expect is that these dry, rough food, coupled with less dry winter this winter, resulting in Miss Zhao mouth ulcers. Clinically similar cases are not uncommon.

      Oral mucosa will produce keratinized layer, the oral cavity of the small glands will secrete mucus protein protective film, their role is to lubricate. Food in the mouth of the chewing process, these protective film will be consumed, and with food into the esophagus together. However, if this consumption is greater than the secretion of glands, the oral mucosa lost the protective layer, it will be directly with the food "face to face." In this case, the oral mucosa is easy to break under the friction of food, of course, followed by ulcers. In general the more dry the more rough the food the more easily lead to ulcers. In addition, the environment (dry climate) and the body's endocrine, immune status, mental state, oral hygiene and other factors are also associated with oral ulcers.