What are these little white bumps in my mouth?

These small white bumps appeared one day almost 3.5 years ago. I've been to see my dentist, family doctor, 2 ENTs and a few other specialists. So far no one has been able to diagnose this. Anti fungals such as clotrimazole and fluconazole have not worked. The bumps can be scraped off with a toothbrush but will return within a few hours. If they are left, they will grow to the size seen in the picture over about 2 to 3 days and then seem to get a little wider and perhaps not so round. They then seem to scrape off by themselves simply by eating something. They are on the roof of my mouth, the inside of lower and upper lips, under my tongue and in my throat. It feels rough when I swallow.
I've had many tests done, swabs looking for yeast, blood work (I'll list all if that would help) and helicobacter pylori test. All negative or in the normal range.
Does anyone have any ideas as to what this could be?
Thanks very much.

[faujidoc1]

seems likely to be oral lichen planus.
have you seen a dermatologist?
oral manifestations of skin disease are often very difficult to diagnose!

[757]

Thanks very much for your response.

I have seen a dermatologist. His thoughts were that having had the bumps for as long as I have, it likely isn't serious and that since they simply appeared one day, one day they would simply dissapear. He was stumped.

I will look into your suggestion of oral lichen planus

Thanks again.

[757]

I am very happy to say that I seem to have been cured!!!  :) After 4.5 YEARS!!!
I caught a nasty cold or flu in Dec. I could not shake it and went to my Dr. he gave me an antibiotic for a sinus and upper respratory tract infection. It was APO-AZITHROMYCIN 250mg. It did not help my sinus infection but after 2 days, it cured the little white bumps in my mouth. It has been about 2 weeks now and they have not returned. I have had the bumps in my mouth every day with the exception of about 4 over the last 4.5 years. So going 2 weeks without them returning makes me very hopeful that they are gone for good. What a relief!
757 .