Hello,
A few conditions where we can see ulcers in throat are various viral, bacterial and fungal infections, allergic reactions to various foods, some medications like NSAIDs, beta blockers for
high blood pressure,
vitamin B12,
folic acid and iron deficiencies, anxiety, stress, lack of sleep, badly fitting dentures, lupus, or lichen plants.
I can see you have ruled out few causes by getting tested. Ask your physician to consider other causes like viral and fungal infections, vitamin deficiencies etc. Have at least 8hrs of sleep every night. Eat healthy foods rich in vitamin B complex and
vitamin C. Stress and anxiety free life. Drink more water. As it's a
white patch, fungal infections and lichen plants should also be considered. Discuss the above mentioned causes with your physician.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Pallavi M., Anesthesiologist