Hi
in the past week i've had 4 cankers on the back of my mouth(soft palate?) near the uvula (i think that's what it's called). It is not on my tongue itself. Anyway it usually appears out of no where then disappears the next day, then reappears a few days later. Anyway in the past week i've had 4 of them. I don't know if it is just the same one reforming or not, or if their different. Does anyone know what is causing them?