Tooth sensitivity: It is the soreness of teeth caused by external stimuli, such as temperature (cold, hot), chemical substances (acid, sweet) and mechanical effects (friction, biting hard objects), commonly known as “tooth acid”, “tooth fall”. All factors that can lead to the destruction of the surface enamel and the exposure of the deep dentin, such as tooth wear, wedge-shaped defects, tooth fracture, caries, periodontal atrophy, etc. can occur dental hypersensitivity. In addition to the unbearable tooth sensitivity and soreness when eating hot, cold and sweet foods, tooth allergy may also produce serious consequences such as pulpitis and periapical inflammation if the teeth are not treated in time. Treatment: First of all, the effect of treatment with desensitizing drugs, most patients can receive very good results. For repeated drug desensitization is ineffective, can be considered for filling or artificial crown restoration. Individuals with severe wear and close to the pulp, if necessary, can consider pulp inactivation treatment.