Tooth sensitivity refers to the appearance of soreness and pain when the teeth are exposed to temperature, chemicals, external forces, etc. It usually occurs due to enamel defects and increased sensory sensitivity of dentin. People with tooth sensitivity, in addition to the need to avoid exposure to stimulating factors, the focus is to address the causes of tooth sensitivity from the source. First, the cause 1, enamel defects: enamel defects can lead to dentin exposure, dentin is not strong, easy to be affected, triggering tooth sensitivity. Factors that can lead to tooth sensitivity include tooth wear, tooth wedge defect, tooth decay, hidden tooth fracture, periodontal atrophy, etc. People who have enamel defects cannot repair themselves, and need to actively deal with the primary factors; 2, increased sensitivity of dentin sensation: this factor causes tooth sensitivity, the patient’s enamel is intact, usually the specific triggering factors are not clear, and may be related to personal constitution. Second, treatment 1, avoid contact with stimulating factors: If patients eat raw and cold, too hot, too hard, too sweet food, etc., may trigger tooth sensitivity symptoms, daily attention should be paid to avoid contact with similar stimulating factors again; 2, general treatment: patients with tooth sensitivity can use fluoride toothpaste or toothpaste containing strontium chloride, both can achieve a certain desensitization effect. Severe cases can also undergo laser treatment, which can close the exposed dentin tubules and achieve the purpose of desensitization treatment. Daily, you can use the pasteurized brushing method, and at the same time, you should brush or rinse your mouth after meals to maintain good oral hygiene; 3. Treatment of primary disease: If the effect is not obvious after the above treatment, it is usually because the patient has certain oral problems, at this time, you should carry out allopathic treatment to relieve from the root. For example, if the gum sensitivity caused by tooth decay and hidden tooth fracture is not cured for a long time, treatment such as tooth filling and pulp inactivation can be carried out. Usually, gum sensitivity can be relieved after dealing with the primary cause.