Damaged enamel as a cause of sensitive teeth Have you ever experienced sudden pain or discomfort after a bite of ice cream or a hot drink? You're definitely not alone. Tooth sensitivity is pain or discomfort in your teeth as a response to certain stimuli, such as heat or cold. By changing your oral hygiene routine, this sensitivity can be easily treated. Some of us have more sensitive teeth than others due to thinner enamel. Enamel is the outer layer of the tooth that has a protective function. When the enamel is damaged, you will experience sensitive teeth. Combats tooth sensitivity Whiten your teeth Strengthen your teeth Blocks nerve signals. With unique Active Micropearls technology