There are thousands of tiny channels that lead to the center of your tooth that might be exposed by receding gums and enamel deterioration. Teeth sensitivity results from feelings being sent straight to the center of these channels when your teeth come into touch with something hot, cold, or sweet. Colgate Sensitive Plus toothpaste's exclusive PRO-ARGIN Technology provides immediate pain relief. Colgate Sensitive Plus creates a calcium-rich layer that closes the exposed channels, shielding sensitive teeth from sudden shocks of pain quickly, in contrast to most sensitive toothpastes that only numb sensitivity.