If it is due to irritation, then you must find out what it is that your tongue is rubbing against. I would suggest seeing an oral surgeon http://www.top3dentists.com/pages/oral_surgery and then see a Neuromuscular Dentist http://www.top3dentists.com/pages/neuro_dentistry. I wonder if you clench down at nights and if you have any scallopings at the borders of your tongue as well which would be caused by lack of space for your tongue in the mouth and the Neromuscualr Dentists would be able to take a look at that more thoroughly.
Please keep us informed
Dear jane
1st I would also check with an oral surgeon. But your issues also could be due to allergies and the possibility of insufficient tongue space due to narrow lower arch or your posterior teeth being "dumped" due to clenching and grinding. Those marks could be just indentations from your teeth.
Sincerely
Dr. Mehregan
Thank you, Dr. Erfani!
If it's what you're thinking shouldn't it have been triggered by a change in my oral cavity. Or could it develop only recently without any changes?
I will try to see these specialists as soon as possible and let you know.
Thanks again!