Oral ulcer is a kind of disease that makes patients very painful, especially long-term recurrent oral ulcer, which brings harm to the human body, is far more than oral ulcer. If there is no effective treatment for a long time, the chance of cancer is very high. Therefore, be sure to understand how to care for recurrent oral ulcers. 1. A reasonable diet is an indispensable part of the diet in nursing work, and a reasonable diet has an important relationship to the rehabilitation of the disease. In the care of patients need to refrain from too hot and sour, rough and cold food to avoid irritation to the ulcer surface, while giving high fiber, high calorie and high protein food. In order to avoid aggravating pain, patients need to eat at a moderate pace, preferably eating less and more semi-liquid or soft foods. 2, choose reasonable nursing tools In the nursing work of recurrent oral ulcer, to choose nursing tools according to the patient's condition, and choose the right nursing tools, is very important. For patients with mild symptoms, it is necessary to use a soft brush and non-irritating toothpaste to clean the teeth, and those with severe symptoms need to stop brushing their teeth and use disinfection cotton balls to clean the teeth to avoid further damage to the oral mucosa. 3, local medication Due to the different conditions of patients with recurrent oral ulcers, there are light and serious, some patients can carry out local medication, but before using the drug, you need to first clean the mouth to maximize the effect of the drug. If the patient's symptoms are more serious, you can also use an appliance to spray the drug directly on the affected area to achieve the purpose of treatment.