Sensitive teeth (or more formally, dentine hypersensitivity) occurs when the enamel that protects your teeth gets thinner, thereby exposing the underlying surface and reducing the protection the enamel and gums provide to the tooth and root. Possible causes of sensitive teeth include: Tooth decay Fractured teeth Worn fillings Gum disease Worn tooth enamel Exposed tooth … Continue reading 4 things to avoid if you have sensitive teeth