<s>[INST] For the past one month frequently getting mouth ulcer.  It starts below the tounge and spreads.  I have taken foric-acid tablets for 15 days, becomplex tablets for 15 days, applied gel for some time and many more medicins.  Now, mouth ulcer has started 4th time and I am worried whether it leads to Mouth Cancer.  Pl sugget remidies and clarify whether it leads to Mouth cancer [/INST] Hi & Welcome to Chat Doctor. I appreciate your concern and can understand your problem of recurrent mouth ulcer. Commonly referred to as authors ulcer, it is not associated with mouth cancer. In addition to local anesthetic gels, multivitamins, NSAID painkillers, full course of antibiotics like Metronidazole and Probiotics like Sporadic powder are found to be effective in the treatment of recurrent mouth ulcers. However, a dental consultation is highly recommended. Hope this answers your query. </s>