Ive had a puss, acidly taste in my mouth for a few months.  It started as mouth sores, which have cleared up, but now I feel like there is a liquid with that awful taste seeping through my upper pallet near my gum line.  Ive been to the dentist three times, had over25 x rays, been to an oral surgeon, been to an net (who thinks it may be systemic), and to my primary physician 4 times for this issue.  No one can figure out what to do.  I would feel better if so wine would at least do blood work or  a swab of my saliva.  I also have MS, which my metro assures me is not ms related Any thoughts?  Even suggestions on where I should turn would be appreciated because this issue is driving me nuts!  Thank you for your time.  My email address is  YYYY@YYYY