Hello & welcome
Probably you are suffering from recurrent apthous ulcers.
No need to worry, first of all you have to modify your lifestyle if you are in much of stress
As ulcers appear immediately start taking multivitamins including zinc, consume lots of water and nutritious diet.
For instant relief of pain along with orrepaste you can rinse with tantum mouthwash.
If ulcers are more in number you can also include doxycycline mouth rinses
to prevent any infection.
thanks & take care