In medical science, there is no prescription that can make mouth ulcers heal at once. Mouth ulcers can be caused by a variety of reasons, such as oral mucosa damage, vitamin deficiency, eating spicy food, infection, genetics, immunity, etc. The severity varies from person to person. After the appearance of mouth ulcers can be relieved by some simple methods, if the symptoms are serious, but also need timely treatment. Common measures include: 1, light salt water gargle: can add a small amount of salt in warm water gargle, can play a role in cleaning the mouth, relieve mouth ulcers swelling, congestion, help promote the healing of the wound. It can be repeated several times a day, but need to pay attention not to swallow; 2, vitamin B2 treatment: vitamin B2 research into a fine powder, with warm water into a thin paste for mouth ulcers, to a certain extent can improve the symptoms of mouth ulcers. In addition, through the above methods can only relieve the symptoms of mouth ulcers, for minor ulcers or can assist in healing. To completely treat mouth ulcers, it is necessary to follow medical advice according to the specific condition. Clinically commonly used drugs such as chlorhexidine gargle, cetiolide tablets, ice borax and vitamins, etc., and laser can also be used to promote healing. At the same time, we need to pay attention to keep the oral hygiene, avoid eating spicy and irritating food, so as not to aggravate the symptoms.