my brother had it before and it was always coming back...my mom noticed it was induced of a particular food he takes... so he avoided that food and it is now okey... there is a powder called alum..you can place it in the ulcer area...it will hurt so much that time then it will help cure the area fast...before i didn't believe because i know that this alum was used cosmetically until one day i was desperate to find a cure and i tried... and now i am recommending it..