People who always have mouth ulcers have a lack of vitamin C. Therefore, people who love to have ulcers can take adequate vitamin C supplements to prevent ulcer attacks, such as oral vitamin C effervescent tablets. You can also eat more fresh vegetables and fruits, such as kiwi, orange, dragon fruit, watermelon, tomatoes, these fruits on the one hand can replenish sufficient vitamin C and water, on the other hand, there are fruits with the function of clearing heat and removing fire, which is good for the healing of oral ulcers and preventing the recurrence of ulcers. People with mouth ulcers should not eat spicy, stimulating and hard foods to avoid local irritation of the oral mucosa. In addition, patients who love to grow ulcers should relax and try to ensure that the mood is calm, do not make themselves in a long-term worry, nervous state of mind.