Thanks for sharing your problem with us.
As per your description it seems that you have ulcers in your mouth.
There are many conditions which causes the ulcers in mouth.It depends upon Age,Sex,occupation,viral infection etc...
Information provided by you is insufficient,so here I am giving common tips to get the relief:
1) Avoid spicy food
2) take food which is rich in vitamin B. Like meat or you can take capsules of vitamin B12
under the prescription of your physician.
3) Avoid stress
5) regularity in food intake and avoid constipation
6) you can have coconut milk or wet coconut
7) To get relief from pain you can apply topical anesthetic
like Lidoocain gel to ulcers,your dentist
would prescribe for you.
In case you are not getting relief please send us your details about age,sex,occupation,medical history;so that I would help you to avoid the condition.
Hope you are satisfied,please give us feedback.