Sensodyne Extra Whitening sensitivity toothpaste is the #1-selling toothpaste for sensitive teeth in the U.S. With twice daily brushing, it helps to remove stains for a whiter, brighter smile, while relieving tooth pain caused by sensitive teeth, and helps to keep the pain from coming back. Dentin hypersensitivity, or tooth sensitivity, is a common dental problem. It's a condition that can develop over time, as a result of common problems such as receding gums and enamel wear. Most sufferers are between 20 and 50 years old. Tooth sensitivity can start to happen when the softer, inner part of the tooth called 'dentin' becomes exposed. A range of things can trigger a twinge or tooth pain for people with sensitive teeth. Here are some of the more common triggers for tooth sensitivity: Eating cold food or drinking cold drinks, eating hot food or drinking hot drinks, eating sugary or sour foods, breathing in cold air, brushing teeth. Since it was introduced in 1961, Sensodyne toothpaste has become the Number 1 dentist recommended brand for tooth sensitivity - in fact 9 out of 10 dentists recommend us. With twice daily brushing Sensodyne provides proven relief from the pain of sensitive teeth. Stop use and ask a dentist if sensitivity persists or worsens or pain/sensitivity still persists after 4 weeks of use.