Tooth sensitivity occurs when the tooth's enamel wears away or gums recede, exposing the underlying dentin. Dentin contains tiny channels that connect to the tooth's pulp and nerves, allowing sensations like hot, cold, or sweets to trigger pain. Maintaining healthy gums and brushing twice daily with a sensitive toothpaste can help prevent sensitivity by keeping dentin covered and reducing further enamel loss. Colgate Sensitive toothpaste provides fast relief from sensitivity and protects teeth from cavities and plaque buildup while whitening them.