Dentin hypersensitivity, manifested as teeth without obvious caries and loosening, but discomfort when encountering hot and cold stimuli or sweet and sour stimuli, can be relieved after a short period of time by removing the stimuli. The common causes are dentin exposure due to excessive tooth wear and gum recession, etc. 1.Patients with the above symptoms are recommended to visit the endodontics department and ask the doctor to find out the site of allergy by probing. 2.After determining the sensitive parts, you can use desensitizer to repeatedly rub on the allergic parts, usually once a day for 3 to 5 days, there will be obvious effects. 3, usually pay attention to eat less hard food, reduce the wear on the teeth, if you have night grinding symptoms, please go to the stomatology department for treatment as soon as possible, toothpaste can choose anti-allergic toothpaste, usually can chew dry tea leaves and walnuts. 4, if the above treatment is not effective, you can consider doing root canal treatment to remove the pulp to eliminate the symptoms.