The healing process of oral ulcers is characterized by the flattening of the ulcer, the formation of granulation tissue, the shrinking of the wound, the subsiding of the redness and swelling, and the reduction of pain. Mouth ulcers are a self-limiting disease, the ulcers usually start to heal in about 5 days, at this time the ulcers gradually become flat, there will be the formation of granulation tissue, the trauma is gradually shrinking, the redness and swelling subside, the pain is gradually reduced, usually in 7 to 10 days or so the ulcers can be completely recovered. In normal times, pay attention to a light diet, do not eat spicy and stimulating food, eat more fresh fruits and vegetables, appropriate outdoor exercise, enhance the body’s immunity, supplement calcium, etc., in order to reduce the recurrence of ulcers. Mouth ulcers, it is best to go to the hospital in a timely manner, under the advice of the doctor active treatment, so as not to delay the condition.