Hopefully this link might be useful if you are suffering from mouth ulcers a "red" light product called Biostick available in UK and US.

Biostick


tony

Good Morning Kathleen,
I hope you don't mind me adding a note of caution to your posting.
If the ulcer does not clear in three weeks do see your doctor or dentist. I, like many others, ignored this advice and it turned out to be a costly oversight.
Keep Smiling
John