The back of my lower front teeth feels as if they are coated with something, cannot see anything, just cleaned again with interdental brush and now the gums appear rather red but I still have the feeling.  I am in my 60th year, could this be a phantom feeling that I understand us elder people get?
Thanks for your query, I have gone through your query. The coating on the inner aspect of the teeth can be the hardened calculus secondary to improper cleaning of the teeth. The redness of the gums is ALS because of the gum infection secondary to deposits. Consult an oral physician and get it examined once. You have to get your teeth cleaned once. I hope my answer will help you, take care.