Spent 3 hours at the dentist on Monday having a filling and two temp crowns. My dentist is normally very good but since Tuesday I've had 4 mouth ulcers along the side of my tongue (the side she did the work). They are pretty painful and I'm using medicated mouthwash to help get rid of them but I can't eat very well and sometimes speaking is painful too. Are they caused by the dental work? Why? Can't remember the last time I had a mouth ulcer.....