What is a common cause of tooth sensitivity?

Tooth sensitivity is commonly associated with enamel wear. Enamel is the protective outer layer of the teeth, and when it begins to deteriorate due to factors such as acidic foods, vigorous brushing, or wear over time, it can expose the underlying dentin. Dentin contains tiny tubules that lead to the nerve endings within the tooth. When exposed, these tubules can allow stimuli, such as temperature changes or acidic substances, to irritate the nerves, resulting in the sensation of sensitivity.

While excessive dental flossing and frequent dental visits are important components of oral hygiene, they are typically not direct causes of tooth sensitivity. Likewise, drinking only cold beverages might lead to discomfort but is more of a symptom than a root cause; it does not directly create sensitivity independent of underlying issues like enamel wear. Thus, wear and tear of the enamel remains the primary reason for increased sensitivity in many individuals.