my grandma 65yrs old is suffering from recurent white patches in the mouth.she is suffering from them since 2 yrs.she consulted many doctors but it was not daignosed.they are really very painful.bcoz of them she unable to take proper diet.she is also unable to open her mouth properly,long before she has implanted artificial tooth but now they r removed bcoz docs thought they might be causing them but even now she is getting them.she is not diabetic.she has hypotension so she tablet for it daily.so can u tell me possibilities for her patches????plzzzzz