I became anemic after emergency surgery and needing a transfusion. 5 days later my bottom front teeth from behind became very sensitive that they hurt, eating or drinking anything cold including some at room temperature. It has been 10 days now being on an iron perscription and I feel fine except the teeth. It is better but I still have the sensitivity but not as invasive. Is this a permanent feeling or will it eventually go away. I am still on the perscription for another 2 /2 weeks.