The main reasons for the long ulcers are as follows: 1, caused by the lack of vitamins and trace elements in the body, vitamin E, vitamin B, vitamin C, the lack of trace elements iron and zinc, are prone to recurrent ulcers in the oral mucosa. 2, caused by incorrect dietary habits, due to long-term preference for spicy, irritating food, or food that is too high temperature, such people will have ulcers in the mouth. The company’s main business is to provide a wide range of products and services to its customers. Traumatic ulcers.