Mouth ulcer patch, the general principle is to paste the side containing drugs, such as the Italian can paste that dexamethasone patch film, mainly paste the white side, that is, the side containing drug ingredients paste in the local ulcer, yellow side facing out. Other kinds of mouth ulcer patch surface has a film cover, tear off the film to reveal the side containing drug ingredients, paste in the ulcer surface to play a good role. Mouth ulcers cause complex, some are mechanical damage, some may be related to autoimmunity, mental tension, stress, etc., some are systemic diseases caused. The use of mouth ulcer patch treatment, belongs to the common local treatment methods, generally faster results. There are more types of mouth ulcer patches, there are containing hormones, such as dexamethasone patch; and antibiotics, such as gentamicin patches. In addition, there are many herbal ingredients patches, according to the instructions for correct use to achieve good results. Generally clean the mouth first, the patch to the mirror to paste in the ulcer area to play a role. At the same time after the patch as little as possible to talk, also do not drink, eat, in order to make the patch play a lasting therapeutic effect.