Frequent mouth ulcers, also known as recurrent mouth ulcers, triggering factors are more complex, and according to the results of the start, modern medicine reached a certain consensus on this is recurrent mouth ulcers, and oral immune status imbalance has a very close relationship. The latest research found that, like the human immune function constraints, the fundamental factor that determines the immune status of the mouth is the local nutritional metabolic state of the mouth. For patients with oral ulcers, whether it is manifested as an innate immune deficiency, an acquired episodic autoimmune reaction, or a complication of other diseases in the body (such as cold, fire, indigestion), or a change in physical status (such as fatigue, lack of sleep, women’s menstruation, etc.), as well as mental stress and other comprehensive and complex factors, can be called the trigger of frequent oral ulcers . And with the influence or overlapping influence of one or more factors above, it leads to the decrease of oral local immunity and immune function disorder, which makes the virus originally latent among the oral mucosa take advantage of the gap and cause frequent attacks of oral ulcers, while the level of oral local nutrient metabolism is very low at this time, corresponding to the level of oral immune function. Therefore, to avoid frequent attacks of recurrent mouth ulcers, it is necessary to maintain the normal level of immune function of the oral cavity, and the key to maintaining the normal immunity of the oral cavity is to start with the nutritional supplementation of the oral mucosa, gums and other tissues. Patients who are more prone to mouth ulcers should pay attention to a light and nutritionally balanced diet, drink more tea, eat more fruits and vegetables, and eat more fish, chicken and other “white meat”. At the same time, they should quit smoking, alcohol and other bad habits, try to eat less fried, spicy or other foods that are irritating to the mouth, and allergic people should also try to eat less seafood and other foods that can easily cause allergies. Choose to use dental gold as a daily oral care products, timely cleaning of the oral cavity, but also to maintain the oral acid-base balance and local nutritional balance, but also obviously help to avoid the decline of oral local immune level. Patients who are prone to mouth ulcers should avoid staying up late for a long time, sleep early and wake up early, pay attention to temperature changes and increase and decrease clothing to avoid upper respiratory tract infections, and women should pay attention to proper exercise and good rest before and after menstruation to keep the body’s immune function in good condition. The above matters can be done carefully to effectively avoid the frequent occurrence of mouth ulcers.