When your enamel wears down or your gums recede, dentin may become exposed. The nerves inside your tooth may become more vulnerable to hot and cold foods, causing tooth sensitivity. Sensodyne® Rapid Relief has a unique formulation with stannous fluoride that is engineered to beat sensitivity fast, by creating a protective barrier over the sensitive areas of your teeth. With twice-daily brushing, it’s clinically proven to relieve sensitivity pain in 3 days.
Yeah...I've learned WAY too much about teeth and gums working on this MOA video and web content.