Dental nerve pain usually occurs with pulpitis, which is also known as the dental pulp. The structural organization of the tooth is the outermost layer of enamel, the middle layer of dentin, and the innermost layer of pulp, or the dental nerve. The enamel and dentin encase the nerve, which forms a cavity that contains the nerve and blood vessels. Pulpitis is divided into acute pulpitis and chronic pulpitis, which are pains caused by infection or inflammatory stimulation of the tooth pulp, which are more intense. The specific causes of dental nerve pain are: i. Tooth decay. This is the main cause. Tooth decay forms a cavity, which will become deeper and deeper and rot all the way to the pulp cavity, destroying the nerve and causing pain. Second, personal habits. Some people like to chew harder food, and chewing harder food often will lead to tooth cracks, and bacteria will enter the pulp cavity along the cracks, causing inflammation of the dental nerve. For these two causes, you should usually pay attention to prevention, adopt the correct way to brush your teeth, change your toothbrush and toothpaste diligently, and develop the habit of rinsing your mouth after meals, especially after eating sweet and acidic foods, you must rinse your mouth to prevent the growth of bacteria. Dental nerve pain is mainly caused by inflammation, and controlling the inflammation will relieve dental nerve pain.