Sensitive teeth can be caused by the following dental issues:
Worn tooth enamel from using a hard toothbrush and using a hard grip while brushing aggressively.
Tooth erosion due to highly acidic foods and beverages.
Tooth decay, worn leaky fillings and broken teeth that expose the dentin of your tooth.
Gum recession that leaves your root surface exposed.
Grinding your teeth at night.
Post dental treatment sensitivity – common, but temporary, especially with procedures such as crowns, fillings and tooth bleaching