If your tooth is cracked by an injury or for any other reason, you may experience a variety of symptoms ranging from erratic pain when chewing food to sudden pain when the tooth is exposed to very high or low temperatures. In many cases, the pain may come and go, and your dentist may have difficulty locating the tooth that causes the discomfort.
To understand why a cracked tooth hurts, it helps to know something about the anatomy of the tooth. Inside the tooth, under the white enamel and a hard layer called dentin, is the inner soft tissue called the pulp. The pulp contains the nerves and blood vessels of the tooth.
When the outer hard tissues of the tooth are cracked, difficult to chew the food. The tooth will not only hurt while chewing, but may also become sensitive to extreme temperatures. Over time, a cracked tooth can start to hurt on its own. Large cracks can lead to infection of the pulp tissue, which can spread to the bone and gum around the tooth.