How strange to see a thread on mouth ulcers. I have just errupted in about 12 on my gums, roof of mouth and tongue (never had more than about 2 before). I wonder if it is something going round that is causing them.
A friend advised me to have Adcortyl, so tried it earlier and it glued my mouth together.
I would recommend that you stick (no pun intended) to using it at bedtime.
Hope they go soon, they are horrid