Hello sir...         Ulcer is a break or discontinuity of oral epithelium...        There are several causes of ulcer             *vitamin B12 deficiency             *stress and anxiety             *iron deficiency anaemia             *viral Infections             *genetic factors             *allergic to certain foods and medication             *gastric disturbances (GERD,gastric ulcers)          TREATMENT:               * Apply dologel or hexigel 3-4times a day        * If the ulcer is due to vitaminB12 deficiency then Multivitamin tablet supplements should be given..

Good morning sir, You may apply ointment Tess/Dentogel on the ulcer 3-4 times a day till it heals completely. Ulcers can be formed due to various reasons and the prevention will be different for different cases, I would advise you to visit your dentist for a check up for a better understanding of your problem and take necessary step to prevent it.

You must consult an Oral Medicine expert advice who is a specialist in Mouth and Jaw diseases and cancer

Apply hexigel or dologel on the affected area. Avoid hot and spicy food. Add a vitamin bcomplex tablet like tablet supradyn once daily for a month