Hello everyone; I made an account to ask this because frankly, the doctors I've seen seem clueless.
I've had a swelling, about the size of a flattened pea, at the top of my hard palate for around 4 or 5 months now. It's just behind my two front teeth. It's not open, bleeding, or emitting any discharge, although occasionally it changes from its usual colour - an inflamed red - to having white spots on it. I've had X-rays checking for cancer and a nasopalatine cyst, but they revealed nothing out of the ordinary.
I've tried hydrocortisone tablets and three courses of antibiotics, to no avail. I used to smoke (I was a smoker when I developed the ulcer), but since giving up around a month ago it's hasn't changed or healed. I now use a form of oral tobacco - called snus - which is held in the upper lip, in something resembling a small tea-bag. Again, I have tried abstaining from this, with difficulty; and again, it had no effect on the 'ulcer'.
My diet isn't particularly great, but isn't too bad either. I've tried removing caffeine and artificial sweeteners, but this made no difference either. I still drink quite a lot of decaffeinated fizzy drinks.
I suffer from CFS/ME, and have done for 5 years, without any ulcers developing - I don't think they're a symptom. I'm of a healthy weight, and am 19.
And, as I'm sure you can tell, I'm at my wits end trying to work out what's causing this thing. Sorry for the wall of text, and my sincere thanks for any suggestions as to what might be causing it.