Eat more fresh vegetables and fruits, supplement vitamin C can prevent the recurrence of ulcers, for example, you can eat more oranges, grapefruit, kiwi, dragon fruit and so on, these fruits have a very good effect on preventing the recurrence of mouth ulcers. In addition, patients who are prone to mouth ulcers can also drink more mung bean soup, chrysanthemum tea, honeysuckle tea and other such teas, these teas have the function of clearing heat and lowering fire. Because when people are on fire, it is easy to cause the mucous membrane in the mouth red and swollen mouth ulcers, appropriate to take the function of fire clearing drinks or tea, on the prevention of mouth ulcers also have a good effect. In addition, patients with mouth ulcers should avoid eating spicy and irritating foods, go to bed early and wake up early to ensure regular rest and relaxation, avoiding long-term tension and anxiety.