hi i had gone through your query and understand your concerns. i would come up with the possibility of MOUTH ULCERS-CANKER
SORES may be the cause for your sufferings.
-Certain foods, including citrus or acidic fruits and vegetables (such as lemons, oranges, pineapples, apples, figs, tomatoes and strawberries), can trigger a mouth ulcer or make the problem worse
-gastrointestinal tract disease, such as Coeliac
disease and Crohn's disease
or tissue injury is thought to be the cause of simple mouth ulcers
-nutritional problems, such as vitamin B-12, zinc, folic acid
, or iron deficiency
are some possible causes.
I hope this is helpful for you, thank you