Gum recession and allergy can be treated with desensitizing medication or daily use of desensitizing toothpaste to prevent tooth sensitivity. 1. Desensitization treatment: It is recommended to consult a doctor for tooth sensitivity and use medication for desensitization treatment. The main desensitizing medications include sodium fluoride, stannous fluoride or silver nitrate, etc.; which can effectively seal the dentin tubules to achieve the desensitization effect, but it must be used under the operation of a doctor. 2. Desensitizing toothpaste: Desensitizing toothpaste contains desensitizing ingredients such as potassium nitrate, strontium chloride, etc., which can be used in daily oral care and can be used for a long period of time; it is also effective in preventing tooth sensitivity. Gum recession leads to tooth sensitivity, it is recommended to consult a doctor for symptomatic treatment, in addition to good oral care, should not eat too cold, too hot or too acidic, too sweet food to avoid aggravating the symptoms.