Nerve pain is not necessarily a sign of a leaking nerve or pulpitis, but in most cases it is a sign of dentin sensitivity. Dentin is located in the inner layer of tooth enamel, when the enamel on the surface of the teeth is worn away, dentin will be exposed to the oral cavity, it receives a certain amount of cold, hot, acidic and sweet stimuli, the pressure in the dentin tubules will change, stimulate the pulp of the teeth patients will feel the tooth soreness, the best way to treat this time to choose the desensitization toothpaste. If the allergic situation is more serious, you can also go to the hospital for desensitization treatment, desensitization treatment can choose drug desensitization treatment or laser desensitization treatment, the effect is still more significant. Dental nerve acid is also likely to have a wedge-shaped defect, wedge-shaped defect is located in the neck of the tooth, if the doctor found after the hospital is a wedge-shaped defect, can be used to fill the fluid to fill the way to repair the defect, the patient’s pain will disappear.