Dear Mr Abdulla
If you are suffering from mouth ulcers since 8 years you may be having aphthous ulcers
but without directly seeing you it will be difficult to say for sure.Chronic ulcers can have causes such as nutrient deficiency,stress
precipitation,allergic causes etc.It would be advisable to find a cause ,trigger factors and direct the treatment accordingly.
All the best
Dr Sonia Suprabha Venugopal
Consultant ENT and Head and Neck Surgery