If the tooth surface wear is very serious, or the root is exposed, resulting in allergic symptoms of dentin, you can use anti-allergic toothpaste, or go to the hospital to let the dentist perform desensitization treatment, which can relieve the discomfort of hot and cold, sweet and sour. If the allergic symptoms are not caused by abrasion, it is very likely that there is a large cavity in the tooth, then the patient will feel that the tooth is sour when eating in a certain position, or there is discomfort when it is hot or cold, and it is necessary to take X-ray film in time to confirm the diagnosis. Then, after removing the cavity and refilling it with resin, the situation will be improved.