I always, ALWAYS have mouth ulcers. They are often large and take ages to heal. They can be on the inside of my lips, on my gums and (as now) on the roof of my mouth - currently got a corker right next to my epiglottis.
Why?
I take a general multivit/mineral supplement and am in generally good health. I do have IBS but definitely do not have coeliac disease.
Can anyone help? It's so painful and really gets me down. It also seems to make my breath a bit pongy 
I did mention it years ago to a previous gp but it was kind of brushed off and I was told to use Corsodyl without much success.