Hi, burning on tongue is related to many things. Most common would be
b12 deficiency. And second could be due to sub mucous fibrosis (smf)which is an oral disease due to use of tobacco , particularly chewing tobacco.
Next Steps
You should get
b12 levels done and get yourself checked by a dentist. Any signs or symptoms of smf can be detected. And you can be prescribed proper treatment and medication.
Health Tips
You can take folvite-5mg twice a day for now for 15 days. And a multi
vitamin also like A to Z or Zicovit after food daily for 15 days. See how u are feeling after this and can come back with details.