Brief Answer: Further tests are needed for final conclusions... Detailed Answer: Hi, There are various factors causing burning tongue: - fungal infection. - anemia, - possible GERD/or other stomach problems - medicines you are taking recently or continuously - oral dentures or other dental work - hormonal changes Before running into conclusions, I'd suggest to: - do culture of oral swab for candida/bacteria infection although you did take diflucan. You will do the sensitivity as perhaps that was not the right anti-mycotic of choice. - do a complete blood profile to rule out anemia - do an abdominal ultrasound - do biochemistry and electrolytes balance - check the levels of feminine/thyroid hormones in blood If everything is clear, then, you should be careful with foods/drinks you eat/drink. All the best! Feel free to ask me other questions you might have! Dr.Alba

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