It is not very effective to use anti-inflammatory drugs for mouth ulcers, because the cause of mouth ulcers is not only a single factor of inflammation, it is a mixture of factors, and has a very important relationship with immune factors. The mouth ulcer itself is related to human immunity, physical trauma, genetics, chemical stimulation and lack of nutrients, so it is not a manifestation of inflammation, and the use of anti-inflammatory drugs is not particularly symptomatic, so it is not effective. The treatment of mouth ulcers needs to be comprehensive, and it should be known that mouth ulcers themselves are self-limiting, and most of them can be healed within a week or half a month without excessive special treatment.