I've always had sore tonsils with ulcers on them also, but my doctor is never willing to give out antibiotics so I stopped going to see him. When I did mention this to a lovely female doctor she suggested changing my eating habits/diet/lifestyle! Nothing much then?! I eat fruit/veg as much as poss and take a good womens vitamin supplement without fail and in a year haven't had any probs with my tonsils since, and I'd previously had this all my life.