If you’ve ever drunk a cold lemonade and felt a tingling sensation afterward, you might have sensitive teeth. Sensitive teeth develop two ways: Gum lines recede or enamel erodes. Enamel and gums act as outer shields protecting dentin, the layer beneath the enamel in your tooth. Dentin is full of tubules that lead down to your root nerves. When hot or cold food or drink contacts the dentin, your nerves erupt in pain [source: Carr]. Unlike … Read entire article »