Itchy teeth can be caused by dentin hypersensitivity, tooth decay, gingivitis, etc. It can be treated by medication and dental fillings. 1. Dentin allergy: It is mainly due to long-term exposure of teeth to acidic tooth decaying substances, teeth wear due to teeth grinding, etc., which leads to exposure of dentin and can lead to symptoms of itchy teeth. Under the guidance of the doctor, local use of sodium fluoride, sodium monofluorophosphate and other drugs, desensitization treatment. 2. Dental caries: Dental caries can cause cavities, which can easily lead to the accumulation of food debris inside, which is difficult to clean, and in the long run, it can cause inflammation of the gingival papillae, resulting in symptoms of itchy teeth. Generally, it is necessary to remove the decayed part, and then use a white resin material close to the color of the teeth to fill the teeth. 3. Gingivitis: Gingivitis is mainly caused by the invasion of bacteria, resulting in inflammation of the mucous membrane and the surrounding fibrous tissue. The stimulation of inflammation can lead to an itchy feeling around the teeth and roots. Periodontal cleaning can be performed under the guidance of a doctor. Itchy teeth, you need to go to a professional hospital to do the relevant examination, to clarify the specific causes, and then continue targeted treatment.