Hi!
Mouth ulcers are treated by dentists.
Ulcers are very common and can occur when u are under stress or any deficiency.
Next Steps
You can apply Hexigel mouthpaint on the ulcer with clean fingers twice a day.
Do not swallow the saliva and spit it out for at least half an hour after application of the mouthpaint.
Have tablet B complex once a day for 15days after meal.
Health Tips
Visit a nearby dentist as soon as possible.