"Another Causes: There are many causes for mouth ulcer like minor mouth injury, brushing with force, sports injury, or accidental bite, toothpastes and mouth rinses that contain sodium lauryl sulphate, lack of essential vitamins, especially B-12, zinc, folate, and iron, allergic response to mouth bacteria, dental braces etc. It can also be caused by other serious problems like celiac disease which is a condition in which the body is unable to tolerate gluten, inflammatory bowel disease, diabetes mellitus, Bechet’s disease which is a condition that causes inflammation throughout the body. Most mouth ulcers that are minor can take around ten to fifteen days to heal without causing any lasting problems. However, the severe ulcers that can have lasting effect on the teeth take a longer time. In some cases, ulcers can lead to a scar as well.

Well its very nice post and useful thanks for this one

Informative post.

I had an ulcer on my lower lips 6 years back. I had been to doctors many times and they said it is just an uncles, don't need to worry about it. Since than I had that ulcer in my mouth, because I had no idea what to do if it doesn't go away. Now that ulcer have became permanent. It wasn't painful even before one month ago, but now it pains. I have been to many dentists, they say that it is nothing. Just use a mouth wash it will automatically vanish. But I'm using mouth wash and taking medicines but the pain is still there. Please suggest what to do.