Hello, * Basically the chronic mouth ulcers deal with the deficiency of vitamins and trace elements with gut disturbances of flora in the majority of the cases. * Over and above routine measures, I recommend following for best recovery - avoid lip biting if practicing - maintain gut health and regular bowel movements with bulk-forming laxatives as ispaghula husk or else - hydration with plenty of liquids - avoid spices, non-veg till possible - high fiber diet with plenty of green leafy veg, cereals, pulses, legumes - daily intake of a multivitamin containing folic acid - avoid smoking or alcohol if consuming - oral hygiene care at best levels - local application of mucopain or else to heal the mucosa faster. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Bhagyesh V. Patel, General Surgeon