Repeated mouth ulcers may be related to dietary, mental, hygiene and other factors. 1. Dietary factors, patients usually eat spicy stimulating food, vegetables and fruits intake is low, resulting in a lack of body water may be more prone to repeated mouth ulcers symptoms. 2. Mental factors, patients usually work and rest time is not regular, long-term late night sleep, mental stress is more likely to lead to lower immunity, repeated mouth ulcers symptoms. 3. Hygiene factors, patients usually do not pay attention to oral hygiene, do not gargle after meals, easy to lead to food residues, breeding a large number of bacteria, the infection may appear in the mouth repeatedly long mouth ulcers. After the emergence of the disease need to actively seek medical examination and treatment, to avoid the emergence of complications.