I am suffering from teeth problem. I have no cavity till but sometime feel cavity like pain below some teeth. I regularly brush my teeth from my childhood once a day. But 7-8 years ago I have cleaned my teeth by a dentist friend and after then I am suffering from cold feel in my teeth even when I inhale a long breath from mouth it feels very cold so that I even can't think of eating ice cream. I often drunk very hot coffee and tea but now a days it also unbearable for my teeth to take very hot things and even chewing hard things also making feeling like sour type pain in jaw's teeth since last month. What should I do?