The pulp is located in the pulp chamber, which is a pulp cavity that runs parallel to the shape of the tooth. In general, the pulp consists of the nerve, blood vessels, fibers and connective tissues, and the pulp plays a role in the nutrition of the tooth and in resisting inflammation. If the pulp is infected, the patient may experience a variety of uncomfortable symptoms, such as pulp congestion, where the patient may feel discomfort from biting, or hot and cold pain, or even spontaneous pain, if the pulp is inflamed. The pulp is located inside the pulp chamber of the tooth, and if there is damage to the tooth, such as cavity, wedge-shaped defect, or infection caused by trauma, the inflammation of the pulp will be produced when it enters the pulp chamber from the outside, crown side, or root side. If the tooth has caries and other lesions, it should be detected, diagnosed, and treated early to control the inflammation outside the pulp.