Patients with mouth ulcers can eat watermelon, which is good for the healing of ulcers. Vitamin C deficiency can lead to ulcers in the mouth, so ulcer patients can supplement vitamin C, through oral vitamin C tablets or use dietary therapy, it is recommended to eat more fruits rich in vitamin C, such as watermelon, oranges, grapefruit, kiwi, cherries, etc. These fruits also have the function of hydrating and clearing heat and lowering fire, are conducive to the healing of ulcers. In addition, the diet should be based on light, warm and soft food, avoid eating spicy, too hot and too hard food to prevent local irritation of the mucosa. Patients with mouth ulcers also need to maintain a regular work and rest habit, avoiding late nights and black and white reversals. At the same time, you should relax and avoid anxiety and tension. In the mouth ulcer local can apply watermelon cream spray, open throat sword spray, lidocaine gel, etc., also can use rehabilitation new liquid gargle, in order to reduce the symptoms and shorten the course of the disease.