Hi sir...    Ulcer is the break or dicontinuity of suface epithelium causes of ulcer:    ** vit B deficiency    ** stress and anxiety    ** Iron deficiency anemia    **GIT disturbances (chron"s disease)    **Use of medications like Beta blockers and pain killers    ** viral infectiona(Herpetiform ulceration)   ** Genetic factor   **citrus food and high acidic foods Prevention: **Avoid spicy foods which trigerrs the symptoms **Keeping the mouth clean with daily brushing and flossing **Changing medications ahich cause ulcers...

Mouth ulcers can be due to various reasons and it is essential that they are examined and treated depending on the cause as unless the root cause has been diagnosed and treated, there are that ulcers would recur.

Mouth ulcers can be caused by many reasons including stress. Even stomach problems can cause ulcers. If you have stomach issues or acidity consult a gastroenterologist. Stress is a very important factor and should be managed.