Research shows over half of U.S. adults suffer from tooth sensitivity, which prevents them from enjoying their favorite foods and drinks, in fear that it could trigger discomfort. The cause? Dental hygienist and Crest + Oral-B Smile Council member, Kareen Wilson, RDH says 80% of sensitivity starts at the gum line. Certain triggers like exposure to air and hot, cold or acidic foods or drinks can cause this sensitivity. The good news is that a simple choice to change the toothpaste you use can make a real difference.